Malicious PDF — malware analysis report

Static analysis result for SHA-256 839d109bf51c8640…

MALICIOUS

PDF

45.0 KB Created: 2020-07-30 11:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8cc8428b92eaf6ad7a5d2b7037a03faf SHA-1: 509943cc89e4077ce87ba787dd77611693c9ea7b SHA-256: 839d109bf51c8640cea8316cf168e45099c240762a83f9519ce30cb7f84b2dc8
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.ru) disguised as a free download for Adobe Reader. This indicates a phishing attempt to trick users into downloading malware or visiting malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=pdf+adobe+reader+9+software+free+download In PDF document text
    • http://files.tabletopsportsinc.com/uploads/1/3/1/3/131398231/8a770964e.pdfIn PDF document text
    • http://files.nanaimotreeservices.com/uploads/1/3/0/7/130776142/2678612.pdfIn PDF document text
    • http://files.tampa-works.com/uploads/1/3/1/4/131437865/2469313.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/1/0433/0687/7080/files/42386580717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/39087367120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/paferikodebaliraduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7727/1703/files/22985574291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/masazeragoxamisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/47552804040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/29082781507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54058680795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/rifidaxexuvogaxubivux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6876/5848/files/lizotegiwepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/1126973039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mubexuv.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_off00007343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 5032 bytes
SHA-256: 92251e77cb30194b84afad188d2f761ad4bbab21e74e6eb3907b2230f3b909bf
font_01_sfnt_off00008472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8472 10032 bytes
SHA-256: 5975a8297a5bc537c21d47d38d20041a70a31c93848dcd795e29665fc7c888da

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