Malicious PDF — malware analysis report

Static analysis result for SHA-256 840af119de7a1ac5…

MALICIOUS

PDF

34.8 KB Created: 2020-08-10 09:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0a42da283a916b96876e05c509aa0ce SHA-1: 528314b9e7785f3a8761409db33a5712de5088d2 SHA-256: 840af119de7a1ac54f1f1324910755bfa0cbbf14d35c43ae781651211bcce07f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to a redirector service identified as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=cambridge+english+starters+9+pdf', which is flagged as a malicious redirector. This suggests the document is part of a phishing or scam campaign designed to redirect users to malicious content.

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=cambridge+english+starters+9+pdf In PDF document text
    • http://files.stephencoetzee.co.uk/uploads/1/3/2/7/132740553/jinirufi_sunutaduve_wozewuv.pdfIn PDF document text
    • http://setaxu.bigbadbaragon.com/uploads/1/3/1/4/131453555/3828a04c731b33.pdfIn PDF document text
    • http://files.moogallery.com/uploads/1/3/1/3/131379724/dc7c5028.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/1/0427/8570/2054/files/64213502868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/renikulopuwoxapuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9825/8073/files/bikini_body_workout_kayla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/86136098177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/44322613878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4896/8100/files/38171428319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/61140972080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/tinesisapebesemoxug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/my_turbo_pc_license_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/zedajeterexefofotusifobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/4624292159.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_off00004a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0D 5656 bytes
SHA-256: 55b9a3e063abcd42df97b0acaa2be862f510bfe5035e5289a9c4da94dda0e590
font_01_sfnt_off00005d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0B 9772 bytes
SHA-256: 9e5ee8ac63e0c4c4bf62393f0c6f21369f2dd558e9439abae443510c6344b70f

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