Malicious PDF — malware analysis report

Static analysis result for SHA-256 8740541dc08d7321…

MALICIOUS

PDF

48.1 KB Created: 2020-08-08 11:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31c9fb825bfbc827261a3289475a9274 SHA-1: b9487aad3fdc3bb8bec890cb93f91053acfb8de7 SHA-256: 8740541dc08d73219ae2847b36f127807d90651b6951691893aee44600b99323
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, disguised as a payroll bulletin. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a high likelihood of malicious intent, likely for phishing or malware distribution. The embedded links within the document body and the structure of the PDF suggest an attempt to leverage SEO tactics to lure victims.

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=bulletin+de+paie+2020+explication+pdf In PDF document text
    • http://files.pcpachicago.com/uploads/1/3/1/3/131379761/pokadojuvikopinaji.pdfIn PDF document text
    • http://files.drycreekbaptistchurch.com/uploads/1/3/0/8/130814043/pavojobalurebipav.pdfIn PDF document text
    • http://files.nbblackhistorysociety.org/uploads/1/3/1/8/131871720/4af117eda74df.pdfIn PDF document text
    • http://files.abcrmc.org/uploads/1/3/0/8/130813913/6014159.pdfIn PDF document text
    • http://files.storiesforchrist.com/uploads/1/3/2/3/132302732/16d7588d5cd3a37.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/1/0432/8544/6824/files/bizowiduzarutepupuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6963/5749/files/38663642590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6267/3054/files/13436361223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/business_process_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7288/8742/files/a_textbook_of_engineering_physics_by_avadhanulu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/58839972049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4713/3088/files/lewugojidigox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6929/0149/files/kolurinamopaxefawomope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/ratepagelabadiwamotusok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/26245121057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7196/2269/files/teks_texas_algebra_2_textbook.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_off00007915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7915 5264 bytes
SHA-256: 9a3ef4cffb6cd4ed7bacc6bb4baf51640d0798180830fa5ad0046807b0e8a1e1
font_01_sfnt_off00008b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B21 12440 bytes
SHA-256: 50afdde407ce5c951a3d79e82f37e880369ef1de466deb7065c368ea64e05721

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