Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0e832680e0026c…

MALICIOUS

PDF

43.3 KB Created: 2020-07-29 18:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9209a83765c562c9d2d9f40955a90f4f SHA-1: d2c162bb35d7ee93ed9a98dca49edd2d100305b3 SHA-256: ab0e832680e0026c24b3ce5242534fafca8debb5828e4830a0e72107e2aa4737
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One such link, https://ttraff.ru/pify?keyword=adding+and+subtracting+integers+worksheets+pdf, is flagged as a known malicious redirector. The document body is heavily obfuscated, but the heuristics indicate a malicious redirector and a link farm strategy. No scripts were extracted, limiting the analysis of direct payload execution.

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=adding+and+subtracting+integers+worksheets+pdf In PDF document text
    • http://files.kariajohnson.com/uploads/1/3/1/8/131871701/8a18f3474e.pdfIn PDF document text
    • http://files.wellness.org.sg/uploads/1/3/1/4/131437249/7598015.pdfIn PDF document text
    • http://files.mckinneyquiltersguild.net/uploads/1/3/0/8/130874207/2449c3a58288a.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/1/0428/9911/2095/files/nifevuxudopet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/balava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/fejababubiwedeluni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/74270711002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/bagofatilubitezesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/57255530875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/78239221111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/65090568953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95909873105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/38018283128.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 8

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_off00006a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A81 5552 bytes
SHA-256: c87fd060befa6df7f4513bbf710cef234d2624025a979a8cf5193dfc57a4fa57
font_01_sfnt_off00007d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5D 10064 bytes
SHA-256: 880ee75dfb5194e3fb7a83439c785d3a704452e7228f824e32a2e7958b8f2002

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