Malicious PDF — malware analysis report

Static analysis result for SHA-256 68dd16251531d014…

MALICIOUS

PDF

42.5 KB Created: 2020-09-12 07:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24d9568cb5b7cb6e108d18776ebe4e07 SHA-1: 29661190a21508f5d875ae70d15d0fc4ad8b7f45 SHA-256: 68dd16251531d014018e8d53d90bfe55315ba79f60c0c71e355149d092e348ee
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector, disguised as search results for 'android ndk github samples'. This suggests a phishing or scam attempt to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=android+ndk+github+samples In PDF document text
    • http://files.blacksheepfotos.com/uploads/1/3/0/9/130968933/fesekej.pdfIn PDF document text
    • http://files.issueslte.com/uploads/1/3/0/7/130775405/e7eef2575.pdfIn PDF document text
    • http://files.bloominggroveinn.com/uploads/1/3/1/1/131164122/rukabiwo.pdfIn PDF document text
    • http://files.lisamccafferty.com/uploads/1/3/1/3/131383664/bamibitamurata.pdfIn PDF document text
    • http://nusunog.rozannaartist.co.uk/uploads/1/3/0/8/130814328/rowel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/accd1f_35ee17ab1c6e40bcbf6044228dd01de7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/277b62_ee1dad4e61754a298dc1b0c93187f014.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0789d5_b173440356334cdf9ab2d41f00c669e3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/82884261445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/the_isle_giganotosaurus_guide.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/238140_236614b3298644f7b3e62cfa1d6f0184.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d55797_79fcae23ecb648b4836c5700e7064d10.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA5 2880 bytes
SHA-256: 619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0
font_01_sfnt_off000067e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 5564 bytes
SHA-256: 808014be7fc99d8dad582be8b62bc02f6a97560ca187764d8cd43c06d8fb80c0
font_02_sfnt_off00007aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA4 10144 bytes
SHA-256: 223fbbdcaf59e15c90474159e4a6a389e2b419bdc683c58d83b9d31f0554e2cd

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