Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bdfebcf318bfa1f…

MALICIOUS

PDF

46.0 KB Created: 2020-08-21 05:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94ab61e0a578c03b3f98a142983f5415 SHA-1: 0a8aa0646de93b7442942035bcbb9e0b8ef78ab3 SHA-256: 1bdfebcf318bfa1f88a1a1827c3b6c78a271f9ac34540f5a0067e9bd60c86038
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure, and 'PDF_SEO_LINK_FARM' suggests a large number of outbound links, many hosted on Shopify. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bfg+all+terrain+snow+performance. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

Heuristics 3

  • 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.
  • 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=bfg+all+terrain+snow+performance
    • http://bavebup.lakecountyiltransition.com/uploads/1/3/1/4/131438539/9653562.pdf
    • http://dekivapu.hartistmetals.org/uploads/1/3/0/7/130738731/fd2e94130d7f.pdf
    • http://files.bonniebcollier.com/uploads/1/3/1/3/131383954/7153734.pdf
    • http://files.somethingsafoote.com/uploads/1/3/2/7/132712129/wamipigonebu-nolat-doperuriganilop.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/77718051356.pdf
    • https://cdn.shopify.com/s/files/1/0437/5265/2951/files/anatomia_microscopica_morroni.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/elcometer_456_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/hallelujah_trumpet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/90060644652.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/53188055978.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/bala_bala_shaitan_ka_sala_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/18254145143.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5589/files/55680198547.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/57787838214.pdf
    • https://cdn.shopify.com/s/files/1/0435/8543/7853/files/icd_10_pcs_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0446/7536/7065/files/rbg_color_picker.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_off000072d2.bin
8c8168226d457713544b2b16a83c68e744912d77e31c872261a4c1a8b2ed5a79
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D2 5476 bytes
font_01_sfnt_off0000857b.bin
e45264307c74a720a31b89c1198fa7f664e8d156783e4da57d32726f754640e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x857B 11276 bytes