Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fbb1e469c73c79…

MALICIOUS

PDF

39.2 KB Created: 2020-08-17 10:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd2fb566c8ace5602851a41cb7659a39 SHA-1: 77da89ccb0c68746e2b453fdd6c1413bac407e49 SHA-256: e4fbb1e469c73c79248d4032d7770960c4d548bd028cb2d9e1fc262c0f3a1eed
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link to 'ttraff.ru', identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and appears to be a lure for users to apply for an EIN. The PDF also hosts a large number of links to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

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=apply+for+ein+form In PDF document text
    • http://tafaxe.damnearcabins.com/uploads/1/3/1/4/131437363/wapomi.pdfIn PDF document text
    • http://files.endurancepilatesandyoga.com/uploads/1/3/2/7/132710491/vavujomobironi.pdfIn PDF document text
    • http://files.davisonavenuepta.com/uploads/1/3/1/4/131438658/6790862.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/1/0433/2145/8853/files/25765661937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7860/5218/files/led_zeppelin_black_dog_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/97952433025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/mega_link_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/78768114431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/neguvosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/bozuxeluvizogalezuwage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/94382731064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7350/2361/files/adlarin_menasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8904/3362/files/student_absenteeism_articles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0410/6651/files/linear_pair_postulate_worksheet.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_off00005eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB6 4752 bytes
SHA-256: 76d660e3d6b748e79c2004386d8869e97a81d7e4fec77748c9d3fe9826230a3f
font_01_sfnt_off00006ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECD 9772 bytes
SHA-256: 82a78cadb06a1ff2583781ca301e9e676139763b85341cc0a0307bacccbc4e23

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