Malicious PDF — malware analysis report

Static analysis result for SHA-256 16aa897018d548f8…

MALICIOUS

PDF

51.4 KB Created: 2020-08-04 17:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5cfe044f47105d1a18087d23ce9dafc3 SHA-1: d5dbd897ddfdb09fd8cb4b520a2284a71b915087 SHA-256: 16aa897018d548f874be811ea8797d44a4618e8bb35f0cce0d0831098c83fc25
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, identified as a redirector for SEO link farms. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=tabela+aliquota+icms+interestadual+2020+pdf', which is flagged as malicious. This suggests the document is designed to trick users into visiting this URL, likely for phishing or to download further malware.

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=tabela+aliquota+icms+interestadual+2020+pdf In PDF document text
    • http://files.dandressler.com/uploads/1/3/0/9/130969982/d00ace42bc69d.pdfIn PDF document text
    • http://files.sarahwisemanphotography.com/uploads/1/3/2/6/132681392/ziviv-jemorad-merufot-rikofemufovub.pdfIn PDF document text
    • http://files.leadershipstarkcounty33bestclassever.com/uploads/1/3/1/3/131379828/zoravigatedibovej.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/1/0428/1496/3868/files/45164081426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4704/2728/files/judutediliwefek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/kiwojidovovufazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4712/4135/files/xenuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/38663551005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/29410786665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/45662318450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/sixofizafigerazoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/pinawosubawugezopaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/49293820606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/94796780803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/watonevuwonero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/john_deere_750_tractor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/xipobobojosigepipajabi.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 6

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_off0000832e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832E 5788 bytes
SHA-256: b490ce2d9299d86129c874c5884c4aa7ccf541ce4d0e502080c6559825ebbb27
font_01_sfnt_off000096c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C2 13016 bytes
SHA-256: b49d4d041b27c23f0138e80fef89bfc1b9ef47cabb01bf38868fde7d340bc7df

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