Malicious PDF — malware analysis report

Static analysis result for SHA-256 11653a9f3641f06b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-10 22:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 011640c2e0b3371115a2b4998b63d2b0 SHA-1: 651a19b85dcdf6e597b3e4b10ebb0615d1932715 SHA-256: 11653a9f3641f06bfea86186a6a8d95749dc6064838341d978577f6ba293993e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains the same redirector URL and other URLs that appear to be part of an SEO link farm designed to lure users with search terms like 'kiran bank po reasoning book pdf'. The primary malicious link is https://ttraff.ru/pify?keyword=kiran+bank+po+reasoning+book+pdf+in+english, which likely leads to a phishing or malware download site.

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=kiran+bank+po+reasoning+book+pdf+in+english In PDF document text
    • http://files.teriannescoble.com/uploads/1/3/1/4/131438308/misud.pdfIn PDF document text
    • http://files.rovercoveresort.com/uploads/1/3/1/4/131453990/2562555.pdfIn PDF document text
    • http://files.nanba-ryu.com/uploads/1/3/0/7/130776542/7c19ab1dd7beee0.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/1/0433/1382/3909/files/80603662884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/hid-_compliant_touch_screen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/67914013556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/72954239862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2123/6386/files/behavioral_economics_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/58351421049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/7546923622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/sudiwepeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4524/8407/files/alice_in_wonderland_book_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/16688384046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/27519024253.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_off000060c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 5476 bytes
SHA-256: 1aac4785b49ad5911bcf60c102815dce5936bdce9cc5af078fa839e5acff0039
font_01_sfnt_off00007351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7351 13224 bytes
SHA-256: 0f7549b2b4b933e4ecc3b13037c5f651e96967a944826482eb3e7c6e0011693c

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