Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef6dab7dc55328c…

MALICIOUS

PDF

41.2 KB Created: 2020-08-10 20:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bab44f1da9174a50598c03c5bfc1d9ce SHA-1: 2850e990545dbb77ea3065abecf4caa98b0da1c4 SHA-256: 5ef6dab7dc55328cb6ae9165d53a7427a30fd2195acdb0bd10e98ec3a2094693
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to potentially malicious content, masquerading as a technical document. The primary redirector URL is identified as malicious infrastructure, suggesting a phishing or malware distribution attempt. The presence of numerous links to Shopify-hosted PDFs further indicates a coordinated SEO poisoning or link farm strategy.

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=mathematics+for+engineers+by+chandrika+prasad+pdf In PDF document text
    • http://files.ohenrymustangband.com/uploads/1/3/2/3/132303329/50189d239004a.pdfIn PDF document text
    • http://files.athensorchestras.com/uploads/1/3/1/3/131380558/8910475.pdfIn PDF document text
    • http://files.limitlessptny.com/uploads/1/3/1/4/131438538/difek.pdfIn PDF document text
    • http://files.quinlanquality.co.nz/uploads/1/3/2/6/132681398/5311663.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/1/0450/3427/4966/files/sekex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/54406983859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/86944140957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/hng_dn_hc_streamline_english_departures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/basic_html5_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/ruet_admission_circular_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/96311055703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/67433085417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/xuxipaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/sweet_potato_pie_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/maximus_auto_group.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_off00005ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF1 5848 bytes
SHA-256: eafba08fb57648fc1635673f51c6a3b7fc6bd46a43a35d9d4933d8664a9969fe
font_01_sfnt_off000073b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 10840 bytes
SHA-256: 00ab459f07f8052fa34f95de82df74edf15c10652584df4f6bc3ff4b6b43053b

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