Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea88bfdc2186786a…

MALICIOUS

PDF

32.3 KB Created: 2020-08-01 19:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95bd69b71df22c5c0d2150f27176ba5b SHA-1: a43e3ec0aa6e7e7d09ec170abc4bcd5d23531a2e SHA-256: ea88bfdc2186786a6d8306a4a6038273c14246bad2b4b2e80713c3322372e6bd
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference a 'Cummins isc 8.3 service manual', suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links further indicates a link farm strategy, likely to obscure the malicious redirector.

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.ru/pify?keyword=cummins+isc+8.+3+service+manual
    • http://files.drscollection.com/uploads/1/3/1/4/131438211/figem_sopaberib_deneru.pdf
    • http://files.vahana.ca/uploads/1/3/1/1/131163834/9215266.pdf
    • http://files.haptotherapiekoningsweg.nl/uploads/1/3/2/7/132740384/2520702.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0466/files/jesijumalakivexemepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/77268214217.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/fibuditolazezitologezami.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/kivaxinidevujesobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/zoruxubusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/84056013337.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/relajujilirapem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/54526724542.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_off0000431d.bin
22e47bd6288bacfefd1e37b15aa402c12e257498a9aabd8a1f76a0d133ceafb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x431D 5300 bytes
font_01_sfnt_off00005512.bin
d3b5572892f2d6664d887a332f7ea8532b20b295ff874d5105a159fac1189fbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5512 9184 bytes

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