Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb83a9faa90da63…

MALICIOUS

PDF

41.8 KB Created: 2020-08-10 22:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25ea2725b7903a0f9d090e8c6888f184 SHA-1: 5ae41e1297444f934f8b93fe7c1b0fae614b09f4 SHA-256: fdb83a9faa90da633bf8f670effc46118d5b59c4328f1044f48d0375c5a61d4a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a critical redirector link pointing to ttraff.cc, indicating a phishing or malicious redirection attempt. The document body, though partially corrupted, includes the same URL, reinforcing the malicious intent. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of multiple external links, including a known malicious redirector, is sufficient evidence for this assessment.

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=tutorial+blender+2.+78+espa%25C3%25B1ol+pdf In PDF document text
    • http://favar.flowengagement.com/uploads/1/3/2/8/132814930/60624.pdfIn PDF document text
    • http://files.autisticpridereading.co.uk/uploads/1/3/1/4/131482959/jetigogolepeji.pdfIn PDF document text
    • http://zinoj.earthrenaissancetechnologies.com/uploads/1/3/0/9/130969656/4700056.pdfIn PDF document text
    • http://files.sourcegifts.com/uploads/1/3/1/8/131872048/nivulibewisuvorevak.pdfIn PDF document text
    • http://files.steppenwolfphotography.com/uploads/1/3/0/8/130813111/1214940.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/1/0433/4331/5102/files/gejogarufopebele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3696/6055/files/10107594654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/37925547895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/cfa_level_1_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/wookie_nookie_1975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/food_addicts_anonymous_food_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/23770938795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/aditya_hrudayam_lyrics_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/5148145857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/pugasu.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 7

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6205 5772 bytes
SHA-256: 3c65c9f11236193b3f7256dc09133e2cc2fcf45d5219aeef7877fc9ec4f45c4f
font_01_sfnt_off0000757e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757E 10136 bytes
SHA-256: cfb8c238a42aba385186db8c2ecea3a7960922be754c5a21aab4dc9b53c7eef9

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