Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e01b8ebfe3769fb…

MALICIOUS

PDF

43.9 KB Created: 2020-07-30 14:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 167827b60481e5a1026f55ba7e44584d SHA-1: aa06f226df4a7c02d5edd8ccc1c2f603279a3550 SHA-256: 8e01b8ebfe3769fbd52d8a7730f684ccfd3c42725b3dd0060410cd7248af403e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm, with many links hosted on Shopify, suggesting a potential SEO manipulation or content distribution scheme. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector and a link farm points to a delivery or redirection attack pattern.

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.cc/pify?keyword=per+la+gloria+d+adorarvi+medium+low+pdf
    • http://files.ubwaosu.com/uploads/1/3/0/7/130775308/b05c2bac610674.pdf
    • http://files.riverrivalwrestling.org/uploads/1/3/0/8/130874469/xawifuzubolel_foxasogur_xudexu.pdf
    • http://files.elitelifecoaching.net/uploads/1/3/2/7/132740533/rupuxerukuzebalob.pdf
    • http://files.a1nerdyhomes.com/uploads/1/3/1/1/131164382/817cc9.pdf
    • http://files.sarahbonnot.com/uploads/1/3/0/7/130740251/422120.pdf
    • http://files.riverrivalwrestling.org/uploads
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/7268349150.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/netufive.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/1881436892.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/modafite.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/nagovexi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/26374080447.pdf
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/18169668073.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6124/files/zupus.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/tokawinijidefenolekerim.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2313/files/jigef.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/69441228269.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_off000063c3.bin
ef23c6794687fdd7683b8858cbb7b985c3b33e6925f0afbcc57df9cbddef62cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C3 5032 bytes
font_01_sfnt_off000074f5.bin
87a2d450774d74adf2636ff92c995a79e57456c85496593405af41ea4b9b850c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F5 14004 bytes

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