Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d50fc3fc2a2310f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 01:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43643c22193da226c28873fec3253e7c SHA-1: 671f8ac1f9cc3cab590ed2782b1b12f12d6b8ea9 SHA-256: 3d50fc3fc2a2310fd2d52c70b80fa2a9996e18d870289fab842099925ee6c3aa
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=english+alphabet+for+spanish+speakers+pdf'. This indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the final malicious destination.

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=english+alphabet+for+spanish+speakers+pdf
    • http://munovo.parkviewclc.com/uploads/1/3/0/9/130969352/3801880.pdf
    • http://files.nfatuated.com/uploads/1/3/1/3/131384442/wuvizogiwuzazu-jotizojebik.pdf
    • http://files.brothersinthewild.com/uploads/1/3/1/6/131607110/varisa_nomozisurewijop_pobixigexib_josemu.pdf
    • http://files.graphiclibrary.org/uploads/1/3/1/1/131163782/dawivam.pdf
    • http://files.piecelovequilt.com/uploads/1/3/1/3/131384424/kokavole_buzozexulixufe_kiruwipowukopu_rapurim.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/44288373276.pdf
    • https://cdn.shopify.com/s/files/1/0436/0713/0270/files/dragonballgt_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/47218157690.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/zirozuzetarug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87913440599.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/sozurutudoxozonifujudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/46851337989.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/vefumulebesavijozodomezu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3335/4663/files/14834554894.pdf
    • https://cdn.shopify.com/s/files/1/0432/9563/7659/files/93912651225.pdf
    • https://cdn.shopify.com/s/files/1/0437/5255/4657/files/51155272200.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/kejorigadikovebi.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/
    • https://cdn.shopify.com/s/files/1/0437/5255/4657/files/51155272200.p

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c65.bin
b5b2f68d4aec80164c5e29bd0b8c06d4b9b0acdce13f223f0781d7c594f47845
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C65 5464 bytes
font_01_sfnt_off00007ef3.bin
8d8a2ea25e76997741c7a2c9872d90c0f860646f610e8d06411bb86eed05287c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF3 10120 bytes