Malicious PDF — malware analysis report

Static analysis result for SHA-256 644c733ff4df0a9d…

MALICIOUS

PDF

44.3 KB Created: 2020-08-01 06:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f33aff1c3eb837e40e693ed11ae3f9fb SHA-1: e03e4472adefd45631dc413ddfd743a6266cb6cf SHA-256: 644c733ff4df0a9dd400fa94355cc093ff7c2e1c2f4e43ebf36847a833457de5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=snap+i%2527+ve+got+the+power'. The document body also contains this URL, indicating an attempt to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious content. No scripts were extracted, but the primary attack vector appears to be the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=snap+i%2527+ve+got+the+power
    • http://files.bishopgradykofc.org/uploads/1/3/0/7/130775062/foxolal.pdf
    • http://files.endofbelief.org/uploads/1/3/0/9/130969003/vatusezipusofif_nonivoxujida.pdf
    • http://files.mcmjanitorial.com/uploads/1/3/1/4/131406356/5b2cce2e6e7ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/30759368807.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/17252346324.pdf
    • https://cdn.shopify.com/s/files/1/0436/0981/7251/files/caracteres_ascii.pdf
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/fimewunakim.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/vegitagibiguguvafok.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/99561288272.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/94798253504.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/penutip.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/98370227869.pdf
    • https://cdn.shopify.com/s/files/1/0428/4379/9719/files/multiplication_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/75263091360.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e3d.bin
4b3a3eec71a6a0c6555787cbc2a1efe91562b3e387329438fbd14fb0b7eb115c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3D 5160 bytes
font_01_sfnt_off00007fe6.bin
3d537192d08e6b794fddc65bf07849bc4c4992217f9ff31aa7e1fb88db668baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE6 11132 bytes

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