Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1078f3eeaec7f7…

MALICIOUS

PDF

58.6 KB Created: 2020-08-03 14:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05ed3d8ca28ee88c09b4ed8350455fb1 SHA-1: 5e7b8d961f520b529ff627e811ac77a4675c6f21 SHA-256: 7e1078f3eeaec7f74a6cfcec7794510a51223f684eda3fbcada7e1fa549d2057
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=capitalism+without+capital+the+rise+of+the+intangible+economy+pdf'. This URL is likely used to direct users to malicious content. The document also contains a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. 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.ru/pify?keyword=capitalism+without+capital+the+rise+of+the+intangible+economy+pdf
    • http://files.memoriescharcoalhouse.com/uploads/1/3/2/7/132710669/5511489.pdf
    • http://files.crumistuff.com/uploads/1/3/1/3/131381078/voxugajotef-nafulepufu.pdf
    • http://files.stemteachershou.net/uploads/1/3/0/9/130969418/6b457b12.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/58508540343.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/jozabaxivifufedurus.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0739/files/jowowijapubepikifezexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/56700640868.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/wababafuji.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/kututuwuzimabajetaxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6893/8658/files/95279073350.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/increase_contrast_of.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/68857762406.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/garulegofuruzox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.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_off0000a4ec.bin
36b4c5ea2c1ed4e66502a103de5bacd8e027cda482ab4c2e4d91629f832d0e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4EC 5808 bytes
font_01_sfnt_off0000b895.bin
56eaca3fa0fb0bdf1320740ce36e5cc76906c51db2a05e66653534957e8fc38c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB895 10556 bytes

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