Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4578ee82325d4c…

MALICIOUS

PDF

48.4 KB Created: 2020-08-22 01:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0bce4d536d7a523954cdeb03f97a506 SHA-1: d5604d098cd0f9878cd171a7e889a93b20e81533 SHA-256: 5a4578ee82325d4c3a1c23c4c2e855a91d8b4cb7e14f849ff7c35af1470c711b
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 a link farm, suggesting an attempt to distribute malicious content. The embedded URL points to a redirector that leads to a suspicious domain, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent.

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.ru/pify?keyword=ahcccs+apipa+prior+authorization+form In PDF document text
    • http://files.oakleytransport.com/uploads/1/3/2/8/132816185/333c4f.pdfIn PDF document text
    • http://files.springscommunityacupuncture.com/uploads/1/3/0/7/130775503/3fe7b5c304d87.pdfIn PDF document text
    • http://files.bthnm.org/uploads/1/3/0/7/130740213/dutoriwotiperubejiz.pdfIn PDF document text
    • http://jexoreb.goplaysport.co/uploads/1/3/0/8/130814423/ccb4616.pdfIn PDF document text
    • http://files.lgnillustration.com/uploads/1/3/1/8/131871687/romepituneseroguget.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/1/0431/6784/2459/files/piwopowuvadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7367/0037/files/cbse_sample_papers_for_class_10_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/51278702817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/mivunopixapitunubowap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/seether_truth_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/14924494986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/33415648220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/formal_letter_address_in_french.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3366/files/balaper.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_off00007915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7915 5260 bytes
SHA-256: 6d082294e9836d42c7c53bf4e0c0147bce81b19ef73be686202062653cf25ef6
font_01_sfnt_off00008ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD0 13024 bytes
SHA-256: 2867ac0fec1a6a0932816aacaad482f826c23dba802163db738b3deea15efae1

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