Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66e8e9558e5d3f6…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 09:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 879c010221708a66b707013a907592b3 SHA-1: 6346698bb1da60439e98e4ad23c83767875600bc SHA-256: a66e8e9558e5d3f6438fbd8e5c91e5709ad953830f43cb590497f0a7e2d488ce
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=multiple+alleles+notes+pdf'. Another critical heuristic indicates a link farm structure, suggesting the document's primary purpose is to distribute traffic to external sites. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware delivery attempt.

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.com/pify?keyword=multiple+alleles+notes+pdf In PDF document text
    • http://files.teamlowa.com/uploads/1/3/1/6/131607712/gupozinaxofopekuva.pdfIn PDF document text
    • http://denefikid.peggymdavis.com/uploads/1/3/1/3/131380107/mimeraro.pdfIn PDF document text
    • http://files.wisedemocracy.org/uploads/1/3/2/6/132695280/jijali.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/1/0434/6095/2229/files/6106806597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/gupoxusufuximawale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/wavirilixit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/teenage_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/77394100397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/19007462397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/savowogofoxifonikili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/57349303234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/mokemelinipikidalimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/vogigokawojupokanas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/bikini_body_guide_1._0.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_off00006add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADD 4944 bytes
SHA-256: a0ae72793033774acf309f819fdf4e9ef5b260a463b9365d76c8fdc11c437499
font_01_sfnt_off00007bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD1 10044 bytes
SHA-256: d4c990f2d653b15c225df3d59fbe79b73a29e3d855b2e2635a76d69179b96e7f

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