Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4992422160e6a8…

MALICIOUS

PDF

55.4 KB Created: 2020-08-20 08:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fc0eb1457278531ff1314964f7029fad SHA-1: b1f4df8f5a871c37fad5f0e5d65ee25586e892e5 SHA-256: dd4992422160e6a8ce555bdb8a6ff5119ace91ce5804083bfa2a23898d15e7dd
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate a PDF link farm designed to redirect users, likely for malicious purposes. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the extensive link manipulation is sufficient to classify this as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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=br%25C3%25A5kform+och+blandad+form+elevspel In PDF document text
    • http://kudos.scottmassagetherapy.com/uploads/1/3/2/7/132712615/favoxapotawunexo.pdfIn PDF document text
    • http://zorexu.laurelvictoriagray.com/uploads/1/3/2/7/132740449/xitotideroles_ranede_tulenazin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5951/0425/files/duligepafibus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/rutazujamujinupiwaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6051/0376/files/anti_money_laundering_act_singapore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/51901108747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0829/4039/files/diagnosis_appendicitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5235/8039/files/absa_premiership_fixture_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/mtg_arena_crashing_on_startup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1282/8833/files/word_synonyms_and_antonyms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1141/4943/files/45412946585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/40517638282.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F7 6016 bytes
SHA-256: f3b5201660759905f0383ee71648216c82485b62a704250b74d3254289c8832d
font_01_sfnt_off000095b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B1 11176 bytes
SHA-256: b852f2a5a910f7d50d947444d292ade9a7f386175459e4011eb5787e91833e98
font_02_sfnt_off0000ba0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0D 16076 bytes
SHA-256: 75fb5eda6c80430b94b20cb0daa906e0e98a9f633c3ecfcf71c743d7414a59fc

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