Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f2b2c49edc437f…

MALICIOUS

PDF

42.0 KB Created: 2020-08-09 11:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f16873b535801e43bc7a826d1446e793 SHA-1: 4c6a3ee319ebf1305112ae97ed3ec3a6e05a7c34 SHA-256: a5f2b2c49edc437f2b1da41b5268d7571d7aad18336d96045cc3adc8433362e2
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract search engine traffic. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to malicious sites via embedded links.

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=pengertian+bilangan+real+pdf In PDF document text
    • http://files.mcsljackandjill.com/uploads/1/3/1/6/131606165/vojebe.pdfIn PDF document text
    • http://keregazom.150spear.com/uploads/1/3/1/6/131606490/aa87d3c12ecec.pdfIn PDF document text
    • http://files.thelighthouseinternational.com/uploads/1/3/0/8/130874495/dupeg_puzodivugemuraj_vamuwinuj.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/1/0431/5843/8039/files/57133756779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/posogosiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/jalesuwus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0433/8073/files/rirufafaxogumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/htmlspecialchars_in_php.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/8416/3746/files/gonorrea_bacteria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/36974192422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/acs_organic_chemistry_practice_exams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/80329940665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8178/4734/files/25887028872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/17227608912.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 2

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_off000064af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 5172 bytes
SHA-256: 1e23ee7b2a984276d380dc2c2e4d6d554150f70aa7c7c704eb74db2dcbd293fa
font_01_sfnt_off00007651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7651 10732 bytes
SHA-256: 5b493fa88ddc1599983767f6f324b286d334eedf0e71d1609c8e37c78a622f28

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