Malicious PDF — malware analysis report

Static analysis result for SHA-256 938d393ded819e50…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 08:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2fcea6cd8d19f080dbaaa6efc86ff4d SHA-1: bd45d251846b70d44da1a45bf3c7d9119c0ae9c0 SHA-256: 938d393ded819e5071ccc8c0ff341b6be6f1a369510cce3d833f52c705741a04
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and appears to be part of a link farm strategy, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to a malicious site via a deceptive link.

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=full+size+bed+sheets+100+cotton In PDF document text
    • http://files.novelsf.com/uploads/1/3/1/4/131483550/mataxopawowojuvuba.pdfIn PDF document text
    • http://files.masonrich.com/uploads/1/3/0/8/130874683/82913.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/1/0444/3042/6278/files/borutinegulegukubokuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/matekonem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6544/1445/files/archer_c7_v5._0_firmware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1784/6432/files/16723621570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/pefuravofanolojebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/avengers_theme_sheet_music_trombone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8841/9741/files/97390107722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/adobe_photoshop_cc_2019_presets_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/biximoxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/guarantor_form_for_employment_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/kaththi_bgm_ringtones.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_off00006214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6214 5060 bytes
SHA-256: ced0846e940e827f7c6b0fa13b8485f6f56c27543ca9ce0d697205133bd4e1a7
font_01_sfnt_off00007341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7341 10208 bytes
SHA-256: 43b2211fa49b6027518efa66d0ffab0f94c3318861f224f7c9fc194764134011

Open this report in the interactive analyzer, or submit your own file for analysis.