Malicious PDF — malware analysis report

Static analysis result for SHA-256 c886003b9c5d5b0d…

MALICIOUS

PDF

40.7 KB Created: 2020-09-19 14:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a716206e276416cf58e43a8b7226fc SHA-1: 9385295aec43f81aafddbb246223a2be69879117 SHA-256: c886003b9c5d5b0d473f6a851773b183b24cb3154d486b4d339def4e796831eb
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL found in the redirector heuristic. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm intended to manipulate search engine results or distribute further malicious content. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=short+pump+middle+school+instagram
    • http://files.cbcseward.com/uploads/1/3/0/8/130874015/bopafejupor.pdf
    • http://files.thefamilyfido.com/uploads/1/3/2/7/132740637/1901223.pdf
    • http://negagu.genpromotion.nl/uploads/1/3/0/7/130740117/600100221f.pdf
    • http://files.learninglandscapes-frlt.org/uploads/1/3/2/6/132681579/mavuganudepiv-kusowekabelat-mokusexasokuni.pdf
    • https://cdn.shopify.com/s/files/1/0438/2621/7120/files/24421992976.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/bible_study_on_fasting_and_prayer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/7814027917.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/niwijesuvilesopigowiwaxe.pdf
    • https://cdn.shopify.com/s/files/1/0444/3347/3702/files/rupaul_drag_race_season_6_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0470/6153/2840/files/platform_business_model_mckinsey.pdf
    • https://cdn.shopify.com/s/files/1/0434/0767/1447/files/14692315792.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/meleriwoxoboraxeroz.pdf
    • https://cdn.shopify.com/s/files/1/0461/8793/7955/files/55318484994.pdf
    • https://0187f6a6-c53d-4518-a3b0-c8118953ac38.filesusr.com/ugd/ce4b7c_c6f13cbe6b3e4dce9cbade8f778005d2.pdf?index=true
    • https://9e66caa5-4b86-46bd-8a93-a578606340b8.filesusr.com/ugd/33c377_10832399cfd8463d8220c8073b9f735f.pdf?index=true
    • https://89b02ced-4e6c-48a2-b35b-74a51b07a51f.filesusr.com/ugd/485053_538a96c0f6324b6daa791ae966035262.pdf?index=true
    • https://250520c7-9e3a-41e8-8049-cfc8b9c14ad8.filesusr.com/ugd/54dfea_cd41543202f04027bc304071f93d69c9.pdf?index=true
    • https://a9cb9006-f232-45f3-a26f-ac7dec4fcf69.filesusr.com/ugd/d90490_51e547d12dbd49dab5b43096e0c09687.pdf?index=true
    • 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_off0000613d.bin
40684fb8ef996cf42ec688465d974cd246ccbeef33c35d86e58631db918dd446
pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 5592 bytes
font_01_sfnt_off0000740e.bin
026ec31633c1693d92dd3c24aba7505d2b824d35bc0a46bd90504d68bdc0bb32
pdf-font-stream PDF embedded font (sfnt) at offset 0x740E 9836 bytes