Malicious PDF — malware analysis report

Static analysis result for SHA-256 778dfb02fd8e5d9b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-04 04:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8eff0c1cae46dd4cfbc0915a239629f SHA-1: 4938e0d0a5fcd8cbdac8b701fa8812162c9a9150 SHA-256: 778dfb02fd8e5d9bc9d6abcf604fdf0bbd8179a77613faff97cd243b8b094721
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to job descriptions and the redirector URL itself, suggesting a phishing or scam lure. The presence of multiple external links, including a link farm, indicates an attempt to distribute malicious content or drive traffic to malicious sites.

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=internal+audit+manager+job+description+pdf In PDF document text
    • http://files.lsegc.com/uploads/1/3/2/6/132683088/kavoradu_fiteroputu_taxosa.pdfIn PDF document text
    • http://files.bjlphotos.com/uploads/1/3/1/4/131454373/nanemon.pdfIn PDF document text
    • http://files.coloradoriverscape.org/uploads/1/3/1/4/131454733/budofikalitasidapena.pdfIn PDF document text
    • http://xavokugis.all-the-world-a-stage.com/uploads/1/3/1/6/131606069/wibakajen_tixifin_zogutosizawu.pdfIn PDF document text
    • http://files.emcspreaders.com/uploads/1/3/1/4/131455475/126335.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gikari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7209/2315/files/35058161081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30408896218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/86552692092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5907/files/zojikevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/62014446681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/95992569818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wotedosepano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/95114536400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3668/0098/files/xiligusilawesaxarafiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/39732388369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/21633820250.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EA 5508 bytes
SHA-256: 9f03562603dfcd4a6e2f12a0aac726e89cbfda87dabf16e763629512cc046c64
font_01_sfnt_off00007b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7A 9932 bytes
SHA-256: a18d5b36d3e46299caabbcaefe5e89767a80b84bd09679a33666207b85da1660
font_02_sfnt_off00009d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D6E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361