Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4c9e9a44dd14d5…

MALICIOUS

PDF

32.0 KB Created: 2020-08-19 13:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3cefdfe6e564d110421ea03e84761be SHA-1: 20ed016a8b2d866eb1698887c915fc505c6646f8 SHA-256: 9d4c9e9a44dd14d5f0a783c48795bce3d74ecf882059d4a98ace55fd97b8f48b
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.cc. The document body, though heavily obfuscated, contains text related to a 'jig drill guide kit' and the malicious URL. This suggests the PDF is designed to lure users to malicious infrastructure by masquerading as a relevant document. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=jig+drill+guide+kit
    • http://files.dftly.org/uploads/1/3/1/0/131070112/4374112.pdf
    • https://cdn.shopify.com/s/files/1/0434/6717/8134/files/sowoselupepavuxukesif.pdf
    • https://cdn.shopify.com/s/files/1/0438/0209/9872/files/police_bharti_2019_gujarat_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0436/7728/6565/files/dadobozizama.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/41786135085.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/remove_watermark_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/cadette_outdoor_journey.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/dugazelag.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/64726168393.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/76892145528.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/husqvarna_yta22v46_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6891/files/42608889324.pdf
    • https://cdn.shopify.com/s/files/1/0431/6354/9847/files/86398614421.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_off0000420d.bin
1e69b4daba4c12f57177c3d5100be9bb42ebd3b815e9cca69a153a4861fe9521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x420D 4656 bytes
font_01_sfnt_off000051eb.bin
0cd620ab7efb212537f983541910177c8392c3d9afab4b45e95443312251ac97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51EB 9920 bytes

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