Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b538bac89456a6b…

MALICIOUS

PDF

54.9 KB Created: 2020-08-23 12:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6d24e62ef9272acac0f06e0a4f28f18 SHA-1: 2774119139412e728f514b1c4831f175cb8bcc47 SHA-256: 1b538bac89456a6bc58bb157d607d8dfeba09dccf695b7a97f542134b876d4e0
194 Risk Score

Malware Insights

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

The PDF contains a lure related to a motorcycle helmet size guide, which is a common social engineering tactic. It embeds numerous links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.cc/pify?keyword=motorcycle+helmet+size+guide'. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the lure text and the malicious URL.

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.cc/pify?keyword=motorcycle+helmet+size+guide In PDF document text
    • http://files.danielmcglaughlin.com/uploads/1/3/0/7/130740483/5527393.pdfIn PDF document text
    • http://files.thebankofguns.com/uploads/1/3/1/6/131637226/medefazok-musadosuziropo.pdfIn PDF document text
    • http://files.escondidofoundationarch.org/uploads/1/3/2/7/132712508/suvidinakavubowu.pdfIn PDF document text
    • http://files.humbiechurch.org/uploads/1/3/2/6/132682171/4400360.pdfIn PDF document text
    • http://files.mmedugroup.org/uploads/1/3/1/6/131636891/d268e31a3.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/1/0434/0042/9731/files/86299223991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/29815428904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/17802968226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/craap_test_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/26016460133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1972/2152/files/docker_run_shell_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/fegivusetikofisumaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/42969830185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/john_deere_chainsaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/prefixes_and_suffixes_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/the_pathways_to_peace_anger_management_workbook.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_off0000980c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x980C 5300 bytes
SHA-256: 844fbe6f798ab03a43fc782057a3aa1773d295e9d68960b3df55d5c404ad0279
font_01_sfnt_off0000aa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA03 10592 bytes
SHA-256: 04c3ea5c2fd3ccf3c5aa817792ed2ade7f747092e664adea96a3e99e6c4b7f5c

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