Malicious PDF — malware analysis report

Static analysis result for SHA-256 183cb539f8bdc771…

MALICIOUS

PDF

70.4 KB Created: 2020-08-05 08:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a38e152adc3a266c120c0ad78b156787 SHA-1: 5c8e7f87f020cc8a6b1d6844063e732403aecfb4 SHA-256: 183cb539f8bdc77167ca9fa97e9bc76cec113d2ecefcf7858a7b404af9d44ece
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and an SEO link farm, pointing to a phishing or scam attempt. The primary malicious URL identified is a redirector that appears to be part of a free-download lure. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to malicious content.

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=production+of+red+blood+cells+pdf In PDF document text
    • http://files.montaukbeachbungalow.com/uploads/1/3/1/4/131438557/delekoti.pdfIn PDF document text
    • http://files.usagaslogs.com/uploads/1/3/1/4/131408581/b19098.pdfIn PDF document text
    • http://files.northriversideng.ca/uploads/1/3/0/7/130775084/minuzetosu.pdfIn PDF document text
    • http://files.hatwan.org/uploads/1/3/1/6/131637553/7149993.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/1/0430/8307/1642/files/60023408497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3001/2316/files/pudigekavasuwegun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/zilodosokexaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/64179598935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/76548541004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/45273287501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/pagiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/autocad_tutorial_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3575/4650/files/86578295223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/farumobipiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4479/7605/files/nami_build_lol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/29529575765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/zejeramu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/78092405938.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_off0000d6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C2 5080 bytes
SHA-256: 465e4855c73b3f341946d878f7a505da6375a3083f61dce69e7fa296b3af0168
font_01_sfnt_off0000e81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81A 10504 bytes
SHA-256: decc68a56426c68f08a8dc7932a40ea61aa1571583c03c8f7f5e0eddbaba0bc9

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