Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d4f61286f11f9c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-19 00:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40482c81f54aa799c5121638775dfab7 SHA-1: 254053ef80499d0fd8a50a11b1d0b7a1fd7c09eb SHA-256: 56d4f61286f11f9c9bde6037032e3d4e47839ef1b188efd946b92abe3c6d2dae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', which is a known malicious domain. The document body, though partially corrupted, contains text related to vocabulary flashcards and also includes the malicious URL, suggesting a lure to redirect users to malicious content. The presence of a payment redirection lure heuristic further supports a phishing or business email compromise attack pattern.

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.
  • 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
  • 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.ru/pify?keyword=capitulo+4a+vocabulary+flashcards+sheet+3
    • http://files.ilpensieroyren.com/uploads/1/3/2/6/132695602/sonoridokowuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/busiwexesagabipo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0504/files/6011296928.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9642/files/12606679173.pdf
    • https://cdn.shopify.com/s/files/1/0438/3195/1517/files/rip_cd_with_vlc.pdf
    • https://cdn.shopify.com/s/files/1/0434/5774/0957/files/renewable_energy_technologies_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/71199338674.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/nativogovadagulasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2585/7703/files/funeral_service_template_microsoft_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/present_past_future_tense_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/simple_punctuation_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1539/files/89549346362.pdf
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/rufezowubuwowinuwejezi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/lomebux.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/3460053627.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_off000067be.bin
38a78fa75eb3af173958d06b390c4098842695675a4d2b19e8c8e0b641f20844
pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 5700 bytes
font_01_sfnt_off00007b23.bin
1a687d7fe415a3d7b4e89f7f5c323bcacb459f5c1b0e9d061610a4ab48d5b877
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B23 10552 bytes