Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa25b80d6fcb1cc…

MALICIOUS

PDF

55.0 KB Created: 2020-08-25 05:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b7bb6718fe8f859176c664f0766a70 SHA-1: 930d3374163f12cd3cd53c0ad1f072354be830cc SHA-256: 8aa25b80d6fcb1cc3a73eda8fe12ed970dc95fc1db15b6c5b48fe5ab46f9e338
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=bhakti+bhojpuri+video+songs+free, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous links and the redirection to malicious infrastructure indicates a link-farming or phishing attempt.

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.cc/pify?keyword=bhakti+bhojpuri+video+songs+free
    • http://files.natomasschoolofmusic.com/uploads/1/3/1/1/131164159/89a34bbd744c6cc.pdf
    • http://xatuka.maidencovechildrenscenter.com/uploads/1/3/1/6/131606490/jotibuwebosokupuzeke.pdf
    • http://kiganixu.edwardjdenecke.com/uploads/1/3/0/7/130776811/28b3c4fb7d25b11.pdf
    • http://files.coachhousecochins.com/uploads/1/3/1/6/131607029/rexakemirug.pdf
    • http://files.haltapes.com/uploads/1/3/1/6/131637306/bapibironegagiliroj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0465/4769/7814/files/tagivu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/18043256039.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/xetusifegozuzovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/calligraphy_letters.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/the_best_grammar_book_to_learn_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9475/files/conduct_disorder_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/36062611955.pdf
    • https://cdn.shopify.com/s/files/1/0434/0829/4044/files/interview_questions_and_answers_for_technical_support.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/wederebowi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/32289100362.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/72528952433.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/5468615090.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_off000090ef.bin
4f135d36a07f786e8e40a8002b3bcffe4320ea647446b8713f522f5257796a2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x90EF 5660 bytes
font_01_sfnt_off0000a433.bin
48b02dae62cbb878a432089d7546069cfea3ce84074ed3a15f245296ed40b79c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA433 13812 bytes