Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf073aca354f49af…

MALICIOUS

PDF

44.9 KB Created: 2020-08-26 01:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ffbecceb8937d04d9cc37f5fbd357353 SHA-1: d00f7ac99e00c0f3da64bfa146e78f04a3f9000d SHA-256: bf073aca354f49afbf4621ce51f9ccf27dee572afdd7602c090488a1a12c523e
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple heuristics indicating malicious intent, including direct payload links and malicious redirectors. The primary malicious URL identified is https://ttraff.cc/pify?keyword=sex+viet+nam+.com, which is likely used to redirect users to a harmful site. The document also contains a large number of links to external PDFs, some of which are hosted on Shopify, potentially for SEO manipulation or to mask malicious activity. The presence of parser-evasion techniques further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF link points directly to executable/archive payload critical PDF_DIRECT_PAYLOAD_LINK
    PDF contains a clickable HTTP(S) URI whose path ends in an executable, script, shortcut, disk image, or archive extension. Documents can legitimately link to installers, so this is a high-risk delivery indicator rather than a standalone exploit fingerprint.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=sex+viet+nam+.com In PDF document text
    • http://wovutuza.johnpconoverphotography.com/uploads/1/3/0/7/130739704/2a056d070b4d.pdfIn PDF document text
    • http://files.tcquality.com/uploads/1/3/1/3/131379939/8618551.pdfIn PDF document text
    • http://nuwabu.bombersouth.com/uploads/1/3/0/7/130740008/woburis-pujuzidabu-wozaduduxu.pdfIn PDF document text
    • http://files.mayolivestock.com/uploads/1/3/2/7/132740951/6463204.pdfIn PDF document text
    • http://taras.wctherapygroup.com/uploads/1/3/2/6/132696056/tijozotolamawot-raniveruv-rupefewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0461/2154/9988/files/7._2_identifying_energy_transformations_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/reduced_hybrid_viability.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/elizabeth_bathory_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2827/4585/files/44221873981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1107/0357/files/4265656013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/sheekkoo_afaan_oromoo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/zaxukedimifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/jubizemebimat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1092/4437/files/abbreviation_for_philippians.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4066/8838/files/cubase_6_torrents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/degomajatizu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9D 3324 bytes
SHA-256: fbfc2ad5cbe3701cd84329435856f3a72ff04652a5bd0a509ad6f52a726b08db
font_01_sfnt_off00006696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6696 4692 bytes
SHA-256: 2df7f4e94fab952f57b7e3b502aeccfd0b80430789ddbf434f36f0b51033b72a
font_02_sfnt_off0000766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766E 9904 bytes
SHA-256: fd62c6e710567c0eda69819ccb73a8c08c08c2974ef6bba3d3df2941abb42acd
font_03_sfnt_off0000984b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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