Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd75b0e370b3875…

MALICIOUS

PDF

46.0 KB Created: 2020-08-26 19:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6730d75acd4e1a48a40432545eed203a SHA-1: 590b3f5a1fe04a604f041c3d6724476dc2f696ca SHA-256: dcd75b0e370b3875b8507679a43380fb07cd331a229c446f9198c239110dc6b8
220 Risk Score

Malware Insights

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

The PDF document contains numerous invisible links designed to trick the user into downloading a payload. The primary malicious URL identified is https://ttraff.com/pify?keyword=wintv+v7+cd+2.5c.iso, which appears to be a redirector to a payload. The document also contains a large number of links to Shopify-hosted PDFs, likely for SEO poisoning to improve search engine ranking and visibility.

Heuristics 5

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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=wintv+v7+cd+2.5c.iso
    • http://files.braunsinc.com/uploads/1/3/2/6/132696483/f514c07.pdf
    • http://files.shirehistory.org/uploads/1/3/0/9/130969200/fimakomukuw.pdf
    • http://files.alldonemarketing.com/uploads/1/3/1/8/131856877/ac7e7abcef82.pdf
    • http://files.immortalize-your-moments.studio/uploads/1/3/1/6/131606890/xevawewonebusa.pdf
    • http://nagajiba.gaenvirothon.com/uploads/1/3/1/4/131453130/7f66e00faf0b0e.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/calvin_cycle_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6507/files/loan_payment_plan_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/kugazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/11600951358.pdf
    • https://cdn.shopify.com/s/files/1/0469/0070/7490/files/39175584761.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/fuketusegesevufuzar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/wigegonigexevu.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_off00007734.bin
1776ad584fc3b6f21c2ea2a6ecead749a5f420f71940dad0b952dca784638dbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 5036 bytes
font_01_sfnt_off00008890.bin
e6758a8483a82be82e5a0b2556cd32d3f88690d5d5939079cfc11c0887ca959d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8890 10192 bytes