Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02342064dbf322b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-09 16:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d108ade7f019536d6084ec6f883229d3 SHA-1: 9885c29e77603e1f8a2a50e8cac6134cbef36b02 SHA-256: a02342064dbf322b467c722d5db008eff6302eba3744ec5ab585e3111e3f3a8b
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to a redirector service, which in turn links to a large number of other PDFs. This suggests a link farm or SEO manipulation tactic, potentially leading to phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of redirector links reinforces this assessment. No scripts were extracted, but the document body contains obfuscated text and URLs.

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=html+tags+pdf In PDF document text
    • http://files.mobileautorepairsolutions.com/uploads/1/3/2/7/132710621/87e8c774e.pdfIn PDF document text
    • http://files.drinkyourcarbs.com/uploads/1/3/1/1/131164252/gitavuxen-volumewuzu-dazuxomu.pdfIn PDF document text
    • http://kazopu.silentnomore.org/uploads/1/3/1/4/131483281/9774745.pdfIn PDF document text
    • http://files.spaceairforce.us/uploads/1/3/2/8/132815123/294490.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/1/0431/5847/0816/files/17412489669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5131/7408/files/dujag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6512/1699/files/7._3_idi_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/75999563082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/79458017901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/pushing_code_to_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/75329685858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/alliteration_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/tears_for_fears_discography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/39855957315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/79132577886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/allen_bradley_powerflex_4_manual.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_off000068ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 5228 bytes
SHA-256: ca3488730f695a77f9df1919796c363086547b66489b9f6fe10ee20ebe725286
font_01_sfnt_off00007a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A67 13604 bytes
SHA-256: b0c6d6f23d737da7d38004b3521497a1702366ff1f5431d52f9531ff1b8f58ae

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