Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c97c1f48795a5b0…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 23:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da9daacf393049a16fce5885e776cedc SHA-1: 9c494817c9b7cf1345ce4f54672aea2beaddaab4 SHA-256: 2c97c1f48795a5b0024b4051a159a8f828abfb5376f35e545d9b0a2e92508862
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics, reinforcing the malicious redirector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=genetics+from+genes+to+genomes+pdf+free
    • http://files.nonatruthseeker.com/uploads/1/3/0/8/130814043/gatojosewalezog.pdf
    • http://files.friendsofconnemarawest.com/uploads/1/3/0/9/130969565/0c41d.pdf
    • http://siwazivol.kirsteenmackayconsulting.com/uploads/1/3/0/8/130873822/2501834.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/dajipezavil.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/ponemolozujuvabof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/dexodutukejosatub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8685957786.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/25167768227.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/63302150289.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/66164629610.pdf
    • https://cdn.shopify.com/s/files/1/0433/3197/7370/files/xezorumeturube.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/fidazerulupalujipodolizi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/zuweduzuwevojo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/31321541221.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/10311710882.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/proper_adjectives_worksheets_with_answers.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/
    • https://cdn.shopify.com/s/files/1/0434/3998/07

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d9.bin
f9a6c76181be3c31ac1bc1bd7a9923b4877130c5bc3f172922a97cb8b33fabb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D9 5264 bytes
font_01_sfnt_off000075b3.bin
ee1245cbe8e183a565a6c5dc234e0dd2d4e207a9ae95d2ec3ecb8c6464140a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 10264 bytes

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