Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2b26a7a8c75e45…

MALICIOUS

PDF

50.7 KB Created: 2020-08-21 00:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61b8cda8b666cd67443c2148dc3ea73c SHA-1: beb8c57e781b319579121d7b21563ae5dbf70b26 SHA-256: ca2b26a7a8c75e4592d725b328d5cf66aa3a8cf9f772b30942b08c87e74906f0
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for phishing or malware distribution. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=positive+adjectives+list+pdf'. Another heuristic flagged the document as a link farm, containing 30 external PDF links, many hosted on cdn.shopify.com. The document body itself is heavily obfuscated but contains the malicious redirector URL and several benign-looking PDF links, suggesting a lure to a malicious site disguised as a resource. No scripts were extracted, limiting further analysis of the payload.

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.com/pify?keyword=positive+adjectives+list+pdf
    • http://files.thornhillschool.org/uploads/1/3/1/3/131382583/vavuwila.pdf
    • http://files.2dacademy.com/uploads/1/3/0/7/130739116/bujojeme.pdf
    • http://files.chacee.org/uploads/1/3/1/6/131606963/jevotejezusabop.pdf
    • http://files.anneyleather.com/uploads/1/3/1/6/131636834/nexebasagew-bikuluginuxa.pdf
    • http://files.littlefootbridges.com/uploads/1/3/0/7/130740517/tutikupipupobufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/fesixewebufuxubiradut.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/queen_perform_accordingly_crossword_clue.pdf
    • https://cdn.shopify.com/s/files/1/0437/8030/9141/files/72053996179.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/8480830250.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/62345918363.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/apery_constant.pdf
    • https://cdn.shopify.com/s/files/1/0436/6322/9078/files/exercices_sur_les_verbes_etre_et_avoir_au_prsent.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2791/files/mosagowadimojilogexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/kivod.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/kurojaremajiwuvuvimojozod.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_off00007c7b.bin
b1796b60c2964ec59b01f7660ef23893c9523c940bbbb333456c0ef6cad8c2be
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7B 5188 bytes
font_01_sfnt_off00008e48.bin
9f4f372a648c55db8ad7c593a9e010a5184326340f6901d5adbc0f2d916b8b38
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E48 15792 bytes