Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8f9793fe0684b6…

MALICIOUS

PDF

54.2 KB Created: 2020-08-04 02:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b07bab6d399863673127bddc0659c069 SHA-1: 4111fc32c0e1e73bfcf75b710f37a2fcdbf16dc4 SHA-256: 5b8f9793fe0684b69cb1b2c3157cf6f07868549ec2fed12864b86e29c06efb62
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary redirector URL being ttraff.cc, which is flagged as malicious. The document also exhibits characteristics of a link farm, pointing to many other PDFs hosted on Shopify and other domains. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lure users to potentially malicious content or phishing sites.

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=administracion+financiera+internacional+pdf
    • http://files.careerhighschool.org/uploads/1/3/0/7/130775150/tifekunug.pdf
    • http://files.clayassociates.org/uploads/1/3/1/6/131606758/gajoxi.pdf
    • http://files.gamblefamilyquarterhorses.com/uploads/1/3/1/4/131406507/xikojorimiwekiv.pdf
    • http://files.frenellesangalang.com/uploads/1/3/1/4/131437978/jeweg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/lugakisi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/95975859675.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1943/files/59538067365.pdf
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/73440672054.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/wonipuranijafufofedasew.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/67402893274.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/zepurorisavutomoto.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/60272006218.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/64054504414.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/15795961797.pdf
    • https://cdn.shopify.com/s/files/1/0438/2385/7824/files/81370665213.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_off0000933e.bin
5c0addb65fcdc3d997e6810455424aa227042025225c412b2fe35736f25c6fc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x933E 5288 bytes
font_01_sfnt_off0000a528.bin
e25df05dbf21a0fd4beb0ebf4e570550df901951bd82c4e1ec001143c667a1c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA528 11428 bytes