Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1aa9f6a6fcd3fd…

MALICIOUS

PDF

45.7 KB Created: 2020-08-07 08:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33bb6ca1030a24c11fd407150e06fa90 SHA-1: ab44ed4e0b1de90c2fa92dad8ce6ccdac63ab6cf SHA-256: af1aa9f6a6fcd3fd589178760622ef9852de1ab8a18bb88512651eaef514b702
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.cc. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of links to other PDFs, including benign ones on Shopify and potentially malicious ones hosted on various domains. The document body text and heuristics suggest a lure related to 'converting bitmap to pdf free' and a call-to-action, likely to trick users into clicking the malicious redirector.

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=converting+bitmap+to+pdf+free
    • http://files.norfolktaskforceonaging.com/uploads/1/3/0/7/130775735/kafupetifekaki.pdf
    • http://files.2ndsc.org/uploads/1/3/1/4/131452867/bd3a27fcd1c0.pdf
    • http://files.orangeeducationfoundation.org/uploads/1/3/1/8/131872079/2356455.pdf
    • http://files.logicdefieslogic.com/uploads/1/3/1/0/131069819/zoxoladonas.pdf
    • https://cdn.shopify.com/s/files/1/0436/0794/9475/files/honda_gc190_parts.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/ichrin_no_hana.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1125/files/xmod_games_lite.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/33342551175.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7701/files/zoxuduzadipejuzenuzituw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/relurifoka.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/tinker_s_construct_material_stats.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/31677236497.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.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_off000060d8.bin
c665adb4ab25eb7825ec2845e9ca0c75914b02125998c58767366d95fb69473b
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D8 5160 bytes
font_01_sfnt_off00007252.bin
e81c02c2149f5c1f28a1e0ab23b00ace841afa690eecc6e90e336bf8d421ae15
pdf-font-stream PDF embedded font (sfnt) at offset 0x7252 13032 bytes
font_02_sfnt_off00009c10.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C10 4324 bytes