Malicious PDF — malware analysis report

Static analysis result for SHA-256 2520cecdab034cfa…

MALICIOUS

PDF

63.9 KB Created: 2020-08-20 23:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae951331a931238f9999226aeb9c9eb0 SHA-1: 6745938c64ec64256d7b7401fadc80f2fc67f8a8 SHA-256: 2520cecdab034cfa145be442289c1f9569afdd41bd56a70f4f3f3c19eafedaba
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=manual+can+opener+target'. This URL is presented within the document body, disguised as a link to a manual for a can opener. The file also contains a large number of external PDF links, many of which are generated SEO links, suggesting a link farm or distribution mechanism. The ML classifier also flagged this PDF with high confidence.

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=manual+can+opener+target
    • http://xogoru.somervilleeyecare.com/uploads/1/3/1/0/131070152/cb00176.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/child_development_13th_edition_john_santrock.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/subject_and_verb_agreement_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/donirimizixewavuziv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6794/files/52613670397.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/33197846389.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxolalinurijelibabozafod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9902/9655/files/paduwezabadates.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/case_study_research_design_and_method.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/ranisub.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/fe_review_manual_3rd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/fanimafosikaxediwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7740/files/xivurobi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af3e.bin
040bfa8890331c870ebd6c301c54d6bd6d9fbc6857f4ffd46cd61e56e511de70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3E 4764 bytes
font_01_sfnt_off0000bf7c.bin
ba55599dd1042f933b9e419fdec951e72edb16d4a94d997d1ddeeaa8a7ecafd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7C 10820 bytes
font_02_sfnt_off0000e475.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE475 4324 bytes

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