Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91021196f40a235…

MALICIOUS

PDF

83.5 KB Created: 2020-08-28 08:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e746abc4a837aa53f82647a31940c4b SHA-1: 61ab3ad2cdb38873f093c933224dc5a74a66321f SHA-256: b91021196f40a235521ad9d8fdae3b73c66db88494ea309792839e8d20ae370e
194 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, suggesting a link farm or redirection tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs and the nature of the heuristics point towards a malicious document designed to lure users to harmful content.

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=cronologia+de+las+peliculas+rapido+y In PDF document text
    • http://files.donshort-artscaper.com/uploads/1/3/1/3/131384573/5837293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/buzenoruvujegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/kewoxifisuponidexif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/8729/4617/files/3523027070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5276/files/zusimajugubizeluginojaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/cs_1._6_indir_jetindir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/converting_between_metric_units_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6835/0626/files/50450234285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9957/6733/files/fenalulanobipatijulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3935/8882/files/96623632732.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83C 5168 bytes
SHA-256: 1ddb5d4426de692b5980107801e610f780c205a30a88460960b0b116e13b8249
font_01_sfnt_off000109d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D6 12004 bytes
SHA-256: 76f27761aa7b1674cc9617674e717b428e149fcc13a625e660f95930ce3cafd6
font_02_sfnt_off00013131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13131 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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