Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9c044e651be4b6…

MALICIOUS

PDF

46.2 KB Created: 2020-08-10 20:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 89ddff84e63f466d91efb35d59bdf260 SHA-1: 7ed648546cf8ae46427a4d2fdd7194dc17633675 SHA-256: ad9c044e651be4b6cf1bc7ad8f6d07f6e3ed0513a17ee978161191553944071a
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text suggesting a lure for 'book review examples pdf download'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic.

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=book+review+examples+pdf+download In PDF document text
    • http://files.clinicalalliancenetwork.com/uploads/1/3/1/4/131455475/2875885.pdfIn PDF document text
    • http://labagof.sdcecd.com/uploads/1/3/2/6/132696030/5411574.pdfIn PDF document text
    • http://files.mormozine.com/uploads/1/3/1/4/131406966/246135.pdfIn PDF document text
    • http://runukolod.damnearlakeofegyptcabins.com/uploads/1/3/0/7/130775350/2e70634dbf3d.pdfIn PDF document text
    • http://danogi.movementforeverfitness.com/uploads/1/3/1/6/131637136/7586905.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/1/0436/2862/6080/files/xalijevezifufikulamiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0210/0886/files/nidikir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/zowufipokuwafaduporuvezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/nofemibibava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/62485934424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/21635222562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/59071604255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/66458591599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/sutabexesudufup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/40353554383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3317/3927/files/capacity_factor_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/renutukopugi.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 3

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_off0000778e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x778E 5520 bytes
SHA-256: 4d2c8b3081da47ab070d37fe6401695e199f616049f7dd535d2da6b24642f8b6
font_01_sfnt_off00008a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A54 9780 bytes
SHA-256: ea2763a333e20f786f595217ee9334f378e4817d896a321a58040fe373407ab1

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