Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c1027dc974e7bb…

MALICIOUS

PDF

54.1 KB Created: 2020-08-12 07:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5bb20f7c2d7a067e1499d873c7fe50c7 SHA-1: fb6d4582577cfcf426273ba8ce69b4623366bb5e SHA-256: 37c1027dc974e7bb3baf9ac6b8461dfcc549e06ac92fdadd812d834d9519f2e8
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with many pointing to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/wb?keyword=u%20boot%20documentation%20pdf'. This suggests the document is designed to lure users into clicking malicious links, likely leading to further compromise.

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/wb?keyword=u%20boot%20documentation%20pdf In PDF document text
    • http://files.mistymaids.net/uploads/1/3/1/6/131606291/vadarikof-neviz-lipisusap-dasefulamakeso.pdfIn PDF document text
    • http://files.balletvermont.org/uploads/1/3/1/6/131606367/4143c06ce88bd.pdfIn PDF document text
    • http://files.creturns.com/uploads/1/3/1/4/131409597/6987350.pdfIn PDF document text
    • http://femeg.stjohnofgod.net/uploads/1/3/1/0/131070581/zeluxemere-zogex-figotukesevu.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/1/0436/2846/2240/files/40232957982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/application_letters_for_job.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/xorobupobar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4892/2270/files/brgschaft_vordruck.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/33701885557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/2590/2240/files/jonaxusuxilagumoxepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2738/8826/files/65397362081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/terovap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/64511992192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/guia_holman_de_apologetica_cristiana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75278808376.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 5

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_off00009714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9714 5124 bytes
SHA-256: 465ff9fe0ef1353916eb203674d1ebe52fe1639cacd9285df98f814bada73641
font_01_sfnt_off0000a870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA870 10408 bytes
SHA-256: cedeb24b767949136aa750eaf81580e5f1336cbdf7925e74bcd3154c4bc9bd78

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