Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf88d0aba6832a48…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 17:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dd2c1032fa4d7d88552386b427558a8 SHA-1: 0f2e0e0b073dc600110fa43365bff7769be9b6d6 SHA-256: cf88d0aba6832a48eadeb2840ea16060521d12f7f01a9d0f02a20ba8941f9049
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=public+finance+management+book+pdf'. This URL is presented within the document body, disguised as a link to a public finance management book. The PDF also contains a large number of external links, many hosted on shopify.com, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The primary malicious IOC is the redirector URL.

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=public+finance+management+book+pdf
    • http://files.akashachamberlain.com/uploads/1/3/2/7/132740291/mibulasev-lebesijosij-zanuxoboxelepo-zifom.pdf
    • http://files.maocorrea.com/uploads/1/3/1/4/131438823/6795867.pdf
    • http://files.victoriamossremoval.com/uploads/1/3/0/7/130738875/241ed5155d24.pdf
    • http://files.pack482glendora.com/uploads/1/3/1/6/131606630/gimadelumitezafam.pdf
    • http://files.pack48
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/26369978761.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/john_deere_la105_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1416/files/bradford_white_water_heater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/duzite.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/canon_rock_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/91447952733.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4800/files/zaromeroxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/30060856968.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/belewakaxenajama.pdf
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/barafekifodekibuta.pdf
    • https://cdn.shopify.com/s/files/1/0434/1337/3084/files/vuzajap.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0032/files/kuniz.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_off00007124.bin
cff55b72d9f5b1fc6ab0e093c454f79d72a2da934ef249d3e7735b25102c0970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7124 5408 bytes
font_01_sfnt_off00008380.bin
b92db52a3aea6deed2c8159fac79c9cadb4ac2bdf60c6567696641d0d496a3af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8380 9816 bytes

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