Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6b696d274d41fd…

MALICIOUS

PDF

74.4 KB Created: 2020-08-02 17:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21fc62bb18268b98815266b90afd182d SHA-1: 45b53171c9f1057f47f4413d160de517ea7b7d0a SHA-256: aa6b696d274d41fd19f5b9e08475ccc81ac86bded0432bf6de7c36b5b3c27780
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.com/pify?keyword=rounding+in+python', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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=rounding+in+python In PDF document text
    • http://files.westbrookecurriculum.com/uploads/1/3/1/3/131398093/4132121.pdfIn PDF document text
    • http://files.standforhope.org/uploads/1/3/1/3/131398258/ropuviwoxam.pdfIn PDF document text
    • http://files.colonialbaptistbradenton.com/uploads/1/3/1/4/131407012/42dbb9a47.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/1/0433/0687/7080/files/57896919986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/36448063397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/gadimizivejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/90908491105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/pegboards_nerds_self_destruct.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/desarazofem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/minecraft_infernal_mobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7403/4600/files/91087591829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1987/9079/files/63310562114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6267/3054/files/27281413554.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE690 4812 bytes
SHA-256: 724552ae6bb4330ccf720949cbc290cda9982c622cc91ac1772617a3f30dbb9f
font_01_sfnt_off0000f700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF700 11020 bytes
SHA-256: 869576a04eebe7593a4b10b903933c3a23449a2f40b026661e76a60e25809cb6

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