Malicious PDF — malware analysis report

Static analysis result for SHA-256 6085a26afbf43af9…

MALICIOUS

PDF

34.0 KB Created: 2020-08-12 23:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 249fd140e142e0a442570634a4ba12b7 SHA-1: 5f937092a8c9df59f798e00f6c102b64cca5b7e3 SHA-256: 6085a26afbf43af9b06e828711708237602b138c230a9b3a8eb6a1d5cce1e40c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/wb?keyword=jvc%20movie%20camera%20manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to this search query, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector. No scripts were extracted from this sample.

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/wb?keyword=jvc%20movie%20camera%20manual
    • http://dofurose.fenixohjelmapalvelut.fi/uploads/1/3/2/6/132683403/509912.pdf
    • http://files.auramoore.com/uploads/1/3/0/7/130740097/voxila.pdf
    • http://wudemeru.lyndonstatesga.com/uploads/1/3/0/7/130775971/b3512d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/58754912104.pdf
    • https://cdn.shopify.com/s/files/1/0438/1245/4560/files/zuvokalumiburej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51439980706.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pizejop.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/castor_beans_farming.pdf
    • https://cdn.shopify.com/s/files/1/0439/1154/4987/files/26709754334.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/6719530298.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/rizikizolobizotu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/fuvutelaxipomejewifo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7969/files/78161512660.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_off00004a72.bin
c01420beadb06cd8c10236d9f6a3b80655a893415555723d5320acfec8ec5944
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A72 4816 bytes
font_01_sfnt_off00005ab7.bin
81ca14fc4451f2a4c50dbcca797ebecac811321e7ae48384d6556f9254789b40
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB7 9680 bytes