Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d71c2dcb82a331e…

MALICIOUS

PDF

48.6 KB Created: 2020-08-05 10:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94928c97305a45a7caa7372d7d57bfae SHA-1: d6dfb8e34986d4a5912fe27399ab11846cb987ea SHA-256: 5d71c2dcb82a331e49098c3df604aeac75f9ac0a636cf8a4cdfa547bc904b9c8
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified as a redirector for SEO link farms. The document body text, though partially corrupted, includes the phrase 'gastrostomy care pdf' and the malicious URL, suggesting a phishing or scam lure. The ML classifier also 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.com/pify?keyword=gastrostomy+care+pdf In PDF document text
    • http://files.kincoastphysio.com/uploads/1/3/1/3/131383251/maxirorij-wugulo.pdfIn PDF document text
    • http://files.forex-social-trading.eu/uploads/1/3/2/8/132814990/gixopipuku.pdfIn PDF document text
    • http://files.henryssports.com/uploads/1/3/0/7/130739268/2760994.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/1/0427/9926/8003/files/56182998417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/nidobokiranarajuzoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46496449222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/gelule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/xupesemeralu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/vajavameba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8338/6280/files/expanded_form_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/66477442091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/2547/0364/files/ardex_k301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5314/5495/files/learn_python_the_hard_way_drive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/zowolu.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 3

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_off00008125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8125 5400 bytes
SHA-256: ccb373dc32ab33021f9344a7a1c2838d3736270134f0e779993e12ef594b4330
font_01_sfnt_off0000937f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937F 10144 bytes
SHA-256: e032a79f46edde9e1c04a390e31bbfe86decb494b89363a1310b0f069d9ea02a

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