Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d42e1077075a4f6…

MALICIOUS

PDF

40.4 KB Created: 2020-08-06 01:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 165269550484f06489b5b0131a9cb7ed SHA-1: b10e085757271f7b3a26c45bc9ada644657074a0 SHA-256: 1d42e1077075a4f63c48323cc850dc9bdc77f6c1cfdbeee21c297174e322b715
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'design and analysis of algorithms 3rd edition solution manual pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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=design+and+analysis+of+algorithms+3rd+edition+solution+manual+pdf In PDF document text
    • http://files.wild-cherry-boutique.com/uploads/1/3/1/4/131437766/0fc121ccde.pdfIn PDF document text
    • http://files.sarahann-photography.com/uploads/1/3/1/6/131607712/8fbc1f.pdfIn PDF document text
    • http://kuwiraki.yourlovespells.com/uploads/1/3/1/3/131384169/d98fbbc5f.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/1/0433/8060/5077/files/biosystems_a15.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/17285620409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/xavuvurevopexari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/gewapugosedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/vofigupasekowasabenebuliw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/28385264813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/74678031400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/gozitekikiwowifej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/gloom_gen_2_learnset.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_off00005c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4C 5720 bytes
SHA-256: 4f08cc4f4e77b5b931e03fb890f372e18580cbd5e24111b527e4db7fef24ab87
font_01_sfnt_off00006fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB1 10716 bytes
SHA-256: 658f67a5d7550919360a2cd4ae6d975569835458b33bd9dee32d156f7e4bbf28

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