Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73e7119574612cb…

MALICIOUS

PDF

44.8 KB Created: 2020-08-01 16:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b47c98078b0b37b7179f566e409743a3 SHA-1: 31b00fc62c590cc4988f8392a415b84b13cd5e18 SHA-256: c73e7119574612cbfaeb7fc2043ce0c0f28df1424adb7703e0927ba4c01ff473
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high ML score and the presence of numerous embedded links, characteristic of SEO spam. One of these links, 'https://ttraff.ru/pify?keyword=canon+eos+rebel+sl1+manual+pdf', points to a known malicious redirector. The document body contains garbled text and what appears to be the same URL, suggesting the primary purpose is to lure users to malicious content through deceptive links.

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=canon+eos+rebel+sl1+manual+pdf
    • http://files.perkinsplumbing.ca/uploads/1/3/0/7/130738607/0b92bb4.pdf
    • http://files.bereanbiblechurchfm.com/uploads/1/3/1/4/131437680/fanikidaxugowugegov.pdf
    • http://files.campbornthisway.org/uploads/1/3/0/7/130775724/laligoz-tukifat.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0430/files/35835111219.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1274/files/maxavekulera.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/reverse_polish_notation_c.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3899/files/mogivokojenigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/67802626460.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/buzuweforaki.pdf
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/23946984375.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6917/files/squiggly_mouth_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/93516934053.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewubi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/57171454233.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/39700983899.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/60561555297.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_off00006e03.bin
72cd094436172e349f522b85612ed86c1078c6fb8b2b21577ed4e996842bc95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E03 5284 bytes
font_01_sfnt_off00007fdd.bin
279028c1f8a3f6cac473ed7a8003304b5f007b47d3a17dab902406bc893299f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDD 11768 bytes

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