Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a8e36d6c767687…

MALICIOUS

PDF

84.9 KB Created: 2020-09-17 07:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d240374d519a880656c2bb7bd3f56bca SHA-1: 3669d1872804873b0403d3ffcc26409a28e9ecd7 SHA-256: a9a8e36d6c767687e214036ea26f66c16bbe1872b6f3c5265f55f81b0102fd8a
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and contains numerous embedded links, many pointing to a link farm hosted on cdn.shopify.com. One critical heuristic indicates a malicious redirector link to 'ttraff.club', which is likely used to funnel users to malicious content. The document body contains text related to the redirector's keyword, suggesting a lure.

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.club/wix?keyword=oak+grove+plantation+louisiana
    • http://files.eggazine.com/uploads/1/3/1/0/131069978/gogazer-mizoxe-xaxile.pdf
    • http://files.mariefmartin.com/uploads/1/3/1/6/131637385/purodiginomef.pdf
    • http://files.ericeslarycampcadet.com/uploads/1/3/1/6/131606006/767838db37d2d4.pdf
    • http://files.christieslines.com/uploads/1/3/0/7/130739742/gijoxas-natokitilixore-nepajiwe-milileluwulat.pdf
    • http://files.paulsfranchiseleague.com/uploads/1/3/1/4/131438249/kabuvoxije_kuvorenuzixuw_raxejusub.pdf
    • http://files.christieslines.com/uploads/1/3/0/7/13
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/wow_how_to_install_addons.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/vozaremopivula.pdf
    • https://cdn.shopify.com/s/files/1/0460/5752/1307/files/98534669515.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/66242765695.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/26279854507.pdf
    • https://cdn.shopify.com/s/files/1/0432/6408/2073/files/tomowi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5789/5841/files/14325758156.pdf
    • https://cdn.shopify.com/s/files/1/0450/1677/6868/files/firig.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/zitaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/8585323618.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110a4.bin
3431a02497b32fcc9f504a84bd28a2d871207a2244ac1495c99a035a0c07a126
pdf-font-stream PDF embedded font (sfnt) at offset 0x110A4 5140 bytes
font_01_sfnt_off0001223d.bin
6ebf15e0019161eae35f9b707c218bb3ca531b1fff5493273d30706712c9d8a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1223D 10812 bytes