Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fbc8be782d428c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-06 21:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f88b4b65f46ab94e271d8a039003374a SHA-1: e8e2714125bb2f4b0d8c97bde78ebae0231a715b SHA-256: f6fbc8be782d428c48d078d732acfa0d7518721bae91fb1dc7fecb594d065148
168 Risk Score

Malware Insights

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

The PDF contains a lure related to payment and invoices, directing the user to click a link. The primary link, 'https://ttraff.com/pify?keyword=free+automobile+bill+of+sale+template+pdf', is identified as a malicious redirector. The document also hosts a large number of external PDF links, many of which point to benign Shopify domains, but the initial redirector is the most critical IOC.

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=free+automobile+bill+of+sale+template+pdf
    • http://files.usualumnibookstore.com/uploads/1/3/0/9/130969046/sanutoduwezo.pdf
    • http://files.kokuabehavioralhealth.org/uploads/1/3/0/7/130740183/878aa.pdf
    • http://files.wjra.net/uploads/1/3/1/0/131070527/vogadutiwovazin-guxoxuse-tegivoxafarat-xomuxaki.pdf
    • http://files.jennyrollsyoga.com/uploads/1/3/2/7/132740541/1d673fd.pdf
    • http://nubawig.brookwoodlearning.com/uploads/1/3/1/1/131163898/5636770.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/nuzodipobimez.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/puzimebiwotomutis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/oxford_advanced_learner_s_dictionary_9th_edition_international_student_s_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tawoxusabevesumaxev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/lujofavuxuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/faxofelidinaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/86470136381.pdf
    • https://cdn.shopify.com/s/files/1/0437/5353/7690/files/jewufefomuvuvapapiwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/track_tapes_value.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/nilaxifizip.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_off00006599.bin
f55628311dfe57ce27e6db45a476ad7b2d2c6b8c407099adae1fb1dcbc98bfa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 5280 bytes
font_01_sfnt_off0000776e.bin
97d4395a3f34565646d60ae18cae5e208aa16782c4c68a745ace00c2e157f23c
pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10860 bytes