Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f577b5d51ee1f4…

MALICIOUS

PDF

48.2 KB Created: 2020-08-04 23:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 177ad37a4151d3c75bbf90fd12fcbcf0 SHA-1: 9850cabcb0d3422a076010bb5789d78b0eb7b7ba SHA-256: a7f577b5d51ee1f4012dc787e8c2468ef46646b0b554f75e170c041db90848f3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with the primary URL pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a deliberate attempt to lure users to malicious content. The presence of a link farm further supports the attack pattern of redirecting users to potentially harmful sites.

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=difference+between+c3+and+c4+plants+photosynthesis+pdf In PDF document text
    • http://files.dalmatiner-von-kalina.com/uploads/1/3/1/6/131637316/jibiroxogup-gikubapikowo-kojasaxejubo.pdfIn PDF document text
    • http://files.michaelbogdanffykriegh.com/uploads/1/3/0/7/130739062/rowuvidebawide.pdfIn PDF document text
    • http://lajivif.californiazion.com/uploads/1/3/1/3/131383664/5db82ee44f.pdfIn PDF document text
    • http://files.summerjhb.com/uploads/1/3/1/3/131384643/patisikoxuziboni.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/1/0431/8085/1364/files/11899451415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/searchs_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2555/3815/files/dulikulewes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/90834482731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2282/7165/files/spanish_alphabet_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/c_max_heap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/15905432602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6112/0919/files/what_is_binwalk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/53833697573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/xufajeneli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/vosugu.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 5

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_off000070a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A7 5828 bytes
SHA-256: 4eb25fbea3d5e48e4a14c885b70113fcbd6d03cf8517b072a9f9441e910f53b8
font_01_sfnt_off00008498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8498 15072 bytes
SHA-256: 973f33ca8a514f363898510329a2915a108f07e39669364bf9a88962b807860e

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