Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c9043196bff32c…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 17:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dbcfbc0dd4c3516e6518ade75c5d3ad SHA-1: 4aeac8f3a0d7aa9ccf682695ddf5e421db33fc78 SHA-256: c8c9043196bff32c678f2f2a058bc3a35305c3ef772420ac926db4476590b84e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for users searching for specific book PDFs. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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.com/pify?keyword=barbara+ann+brennan+books+pdf
    • http://files.jenniferroseheath.com/uploads/1/3/0/7/130739883/rudunozewi.pdf
    • http://files.elliehutchison.com/uploads/1/3/0/9/130968921/19df7cc4.pdf
    • http://nusorup.groveparklife.com/uploads/1/3/0/8/130874493/e5a3c0a.pdf
    • http://files.kathrynyarbrough.org/uploads/1/3/1/3/131384400/dejepadag.pdf
    • http://files.friartucker.com/uploads/1/3/0/9/130969873/xoxumabagekumijisixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/96525853611.pdf
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/gilogemikevosome.pdf
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/14549531628.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/1332072593.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/33949703953.pdf
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/490912972.pdf
    • https://cdn.shopify.com/s/files/1/0434/1153/8072/files/crouton_for_chromebook.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/69053021429.pdf
    • https://cdn.shopify.com/s/files/1/0435/2793/0011/files/feludibujilabad.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_off00006272.bin
ebb91e30c422f62367de15022fe5dd640ace8dcf84a66155fcb445cc9ff951a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6272 5256 bytes
font_01_sfnt_off0000745e.bin
52350a9ab3acf4d90c3f61f2a9ff60c67d53dcca94338133d270e8ab1f7651d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745E 10008 bytes

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