Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a49fa7b3e53646b…

MALICIOUS

PDF

54.8 KB Created: 2020-08-07 01:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f03e06660a109076d6bf9abd8239d32 SHA-1: e8290af56a847a5ee95bdcb9942c4a93d30c25db SHA-256: 4a49fa7b3e53646b7ee1f0c7a2d6ff553f5c74a3396cfe2ede405217a83fcc8f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is embedded within the document body and also appears in the extracted URLs. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious link redirects to a URL containing a keyword related to engineering drawings, likely a lure to entice clicks. The document itself is generated by wkhtmltopdf, suggesting it might be part of a larger phishing or scam campaign.

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=geometric+symbols+in+engineering+drawing+pdf
    • http://files.appliancerepairmacon.com/uploads/1/3/0/7/130740536/5382287.pdf
    • http://files.freyawaterson.com/uploads/1/3/1/4/131453284/1622477.pdf
    • http://files.teachwithssb.com/uploads/1/3/1/4/131438874/pubefagifafom.pdf
    • http://files.positivevibesonly90.com/uploads/1/3/1/8/131856331/zuduwisojejul.pdf
    • http://files.carolinemiekinaillustration.com/uploads/1/3/1/1/131164081/6229087.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/ziborezosanonepesigex.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6071/files/god_pickaxe_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/byod_policy.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/5hp_honda_outboard_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3626/2050/files/vamawop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwofomakilaxenifotet.pdf
    • https://cdn.shopify.com/s/files/1/0438/3028/0352/files/armor_of_god_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/wovatezafabutexow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/wakaponomapokajorupopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/22550841576.pdf
    • https://cdn.shopify.com/s/files/1/0438/6593/1936/files/jaban.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/corso_di_armonica_a_bocca.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088a1.bin
b1c05e08c6ba925ac74aa1c38579b2bf2a43727b45ccc438f6ccff03f5e72c17
pdf-font-stream PDF embedded font (sfnt) at offset 0x88A1 5628 bytes
font_01_sfnt_off00009bc6.bin
ae046fa668e962814a78be198ffd599ca324bdf726b73dfbc94cf33bb8fc5668
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC6 10508 bytes
font_02_sfnt_off0000bf66.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF66 4324 bytes