Malicious PDF — malware analysis report

Static analysis result for SHA-256 514e8ff8ae28c0a1…

MALICIOUS

PDF

43.7 KB Created: 2020-08-04 01:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cd3f733b8960dcb28c1e5fccdc68cb5 SHA-1: 7c0721e3f04a970ab2fccf495191bd7d069b5db3 SHA-256: 514e8ff8ae28c0a17e7bda82ff38fe99d2953677f2703cb7003c3cd3eebf8c0c
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.ru/pify?keyword=acrobat+dc+cannot+edit+pdf', is designed to lure users by suggesting a solution to a common software issue. The document body, though heavily obfuscated, contains references to 'Acrobat dc cannot edit pdf' and 'wkhtmltopdf', reinforcing the lure. The presence of numerous Shopify-hosted PDF files suggests an attempt to blend in with legitimate content while distributing malicious links.

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=acrobat+dc+cannot+edit+pdf
    • http://files.harleyeaston.com/uploads/1/3/1/3/131398142/xujilefewar-dewizok.pdf
    • http://files.dassiedahan-author.com/uploads/1/3/1/4/131436971/wixodasa.pdf
    • http://files.tulipanproductions.com/uploads/1/3/1/4/131406181/9675420.pdf
    • http://files.lifeschool-education.com/uploads/1/3/2/8/132815298/5629068.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/xinasozabemekexokowade.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3223/files/dutch_curse_words.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9383/files/1989_chevy_truck.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/24930325705.pdf
    • https://cdn.shopify.com/s/files/1/0435/7026/6273/files/12836413842.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30072581460.pdf
    • https://cdn.shopify.com/s/files/1/0432/1633/9111/files/bajupuvupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9856/9888/files/41348393775.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/final_cut_pro_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/wenoseverogifekelabope.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/porovurujapiganipuzul.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/kexenaburunubajibiwuvopi.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_off00006ac3.bin
17a452ae6438fe7d073f6c1a4ca93303d1cfbb59a66e96b80265d14a35ed88ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC3 5068 bytes
font_01_sfnt_off00007c0f.bin
e581d2c60764e1ed5edc63f84c250b0f8126384883419ee9fc37cee755dc4463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0F 10984 bytes

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