Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef36b6166ec2306b…

MALICIOUS

PDF

81.4 KB Created: 2020-08-03 05:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffe2ad18d6a512fbc55f0c7a6d67375d SHA-1: 193c8310c9712b16038cfcdaa7358c5c3f83bb3c SHA-256: ef36b6166ec2306b5b1db440bb228c73b0574aabbfe7f5c01ac0439bd72f3a7e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm designed to redirect users. One of the primary links points to a known malicious redirector service (ttraff.cc), suggesting a phishing or malware distribution attempt. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=void+on+trigger+enter+example
    • http://files.lemonpatches.com/uploads/1/3/2/6/132680986/4918194.pdf
    • http://files.earthartbalance.com/uploads/1/3/1/1/131163667/bojimunedage_nifobakumitig_jeledojupika.pdf
    • http://wugoba.drickahair.com/uploads/1/3/2/7/132710621/nidufogexujo_pugop.pdf
    • http://files.peacememorialauditorium.org/uploads/1/3/1/4/131438142/bigovaj-kijebujukeleba-kojuvutunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/undeath_immersive_lichdom.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/wokuriwomuxut.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/14801257676.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3127/files/divanowililemaru.pdf
    • https://cdn.shopify.com/s/files/1/0438/6321/2192/files/dumejijijuxapab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9312/2460/files/97136184024.pdf
    • https://cdn.shopify.com/s/files/1/0436/4464/9630/files/26908210752.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/49699724598.pdf
    • https://cdn.shopify.com/s/files/1/0441/2529/0648/files/vopotiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/carrier_reefer_unit.pdf
    • https://cdn.shopify.com/s/files/1/0432/1637/1867/files/10264164103.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/sosebet.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_off0000fab4.bin
2d893c3eeb1713c69b3d4fc0c08196d77a310cd6485b11c4217e5083e562c6ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 5136 bytes
font_01_sfnt_off00010c1f.bin
cc7b1432ad132fc5c08489a5241ad3a60470648e5568f8bb06d16d550fcbb20d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1F 13652 bytes

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