Malicious PDF — malware analysis report

Static analysis result for SHA-256 56645e94b0ffb362…

MALICIOUS

PDF

46.9 KB Created: 2020-08-08 00:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9e5bb2d800c25ce75e378aef1782c2 SHA-1: 509a2307c6b2a07e9f6b957c999954dc17e8f715 SHA-256: 56645e94b0ffb362430e2cb289cad1d52cf7bb8439f42fcd4449e15275f19bb7
130 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=tally+notes+basic+accounting+pdf+free+download', is likely used to redirect users to a malicious site. The document also exhibits characteristics of a fake invoice lure, further suggesting a phishing or scam attempt. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content.

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.
  • 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.cc/pify?keyword=tally+notes+basic+accounting+pdf+free+download
    • http://beferof.johnrowlandsongs.com/uploads/1/3/1/0/131070420/kuseg.pdf
    • http://files.mogooch.com/uploads/1/3/0/7/130739779/f5cc93a4682.pdf
    • http://files.allisonwarden.com/uploads/1/3/1/3/131384407/6736111.pdf
    • http://files.smallthingsmarket.com/uploads/1/3/0/7/130738657/gomog-puribulodudov.pdf
    • https://cdn.shopify.com/s/files/1/0433/5013/0846/files/87259646473.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/simobawedewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/luzawoburozate.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/vudosozirewijamitijire.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/dadevonaxan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/zekanatibikorezan.pdf
    • https://cdn.shopify.com/s/files/1/0428/4225/9612/files/19249647602.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1118/files/bsc_zoology_books_for_free_in.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/xomodapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/74969408244.pdf
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/polifudajigugexubaxunag.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_off0000782e.bin
2a7e6d95dac14a1ab6293278eecd09a0487a6b779db58c21ba537a20dbb59c45
pdf-font-stream PDF embedded font (sfnt) at offset 0x782E 5608 bytes
font_01_sfnt_off00008b63.bin
f52757ed44832e5de1f3dd8a7adfff4194d72f3cd1728fce1ed8dd69597f9f59
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B63 10152 bytes