Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ab04a80d0da0fd…

MALICIOUS

PDF

73.3 KB Created: 2020-08-10 14:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a426eb246c5091aa32825dac5e62a0b SHA-1: 75b3c10b8c6bc69ac8314ed75d226087aedab82a SHA-256: 04ab04a80d0da0fdccc90839e2f4335292e9b7a736becd17ab92687c80b417fa
194 Risk Score

Malware Insights

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

The PDF contains numerous links to an SEO redirector, which in turn points to a malicious URL. This suggests a phishing or scam attempt to lure users to malicious infrastructure. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs further supports this. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious redirection.

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=adding+and+subtracting+polynomials+worksheets+pdf In PDF document text
    • http://files.lacla.us/uploads/1/3/1/4/131406701/5208991.pdfIn PDF document text
    • http://files.raymondbonterdesigner.ca/uploads/1/3/1/3/131381363/752f4e6c44a.pdfIn PDF document text
    • http://files.yamilkanoa.com/uploads/1/3/1/6/131636954/3898058.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/1/0434/6707/9830/files/chaos_druid_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/isotropic_minerals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5528/3366/files/23672049650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/kutevoxugakuluto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/rivetogipugojesakudavikam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/5727325415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/79109345965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/vejomekurufawifaduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4109/4812/files/80023373218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/43817405714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5936/3483/files/85451209248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1133/2507/files/86806529330.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71D 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off0000e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 5956 bytes
SHA-256: f627e152f33c780a3c8262504a83940015d943becc95a1523b3796d6870b7c10
font_02_sfnt_off0000f53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53B 9932 bytes
SHA-256: 7fea4454775bc964742fd2a180bf99105a4e79574b71b7ad2ccf9d0276d39b01

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