Malicious PDF — malware analysis report

Static analysis result for SHA-256 85dc7fb7012e5acd…

MALICIOUS

PDF

45.5 KB Created: 2020-07-29 22:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 148f482073439dc6aa0a17d9e48e95fc SHA-1: c435eee4dbd2750eed9c07a1330f7a733d21f713 SHA-256: 85dc7fb7012e5acd2c2dfad3ec964ac9f468cbbe5ed8a2f4d7fad54449435826
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'automatic transmission gears pdf', aligning with the SEO link farm heuristic. The presence of embedded URLs and the malicious redirector strongly indicate an attempt to direct users to malicious content, likely for phishing or malware distribution.

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.ru/pify?keyword=automatic+transmission+gears+pdf In PDF document text
    • http://files.fflinstall.com/uploads/1/3/2/8/132814809/b39009c.pdfIn PDF document text
    • http://files.artisanbuiltins.com/uploads/1/3/1/4/131483002/talegegogopa_zototavufuviz.pdfIn PDF document text
    • http://files.kylekopko.com/uploads/1/3/1/0/131069808/6546017.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/1/0432/5595/5613/files/95330853507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/gopiropogalujunadedara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/rajimimenaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1984/6311/files/8566567215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/kovofivesusema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/46355019347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/89551999146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/raneruxerexelazosona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1445/3410/files/46482924885.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A6 5316 bytes
SHA-256: f6bbc1397f6407b3912eb1fde9569261ab76d12c393854dabbdb473e1bc75299
font_01_sfnt_off0000879b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 9864 bytes
SHA-256: c80b0e1e498547ef20d23026d14e5d2078272d0272e1eab3c6b1964ad9012f5a

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