Malicious PDF — malware analysis report

Static analysis result for SHA-256 59affaaf627ac8a6…

MALICIOUS

PDF

48.9 KB Created: 2020-08-09 17:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c273b4e6ea54e8553434829c3892462d SHA-1: a8fe89f128518cf81426bade2d4022012ea6dd6f SHA-256: 59affaaf627ac8a68b43f93568289fbc82804d4d4ba60e0d3d6d53f1d2b1ee9f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=vocabulary+in+use+advanced+cambridge+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious sites under the guise of providing a document. The ML classifier strongly supports the malicious verdict.

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=vocabulary+in+use+advanced+cambridge+pdf
    • http://files.kellydaydreamer.com/uploads/1/3/1/8/131871453/jaligitoduruxig.pdf
    • http://files.greensborodeckandfence.com/uploads/1/3/0/7/130776344/7366072.pdf
    • http://kijavi.miyagi-ajet.org/uploads/1/3/0/9/130969744/3985686.pdf
    • http://files.movementforeverfitness.com/uploads/1/3/0/7/130776460/kajebiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/jutagikugig.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/42229843006.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/baofeng_uv_5r_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/architecture_design_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/business_information_system_5th_sem_calicut_university.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/gututirukalunud.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/battered_woman_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/bajuwugedazimodedofuxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/dovume.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/samsung_scx-_3405w.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/21036904466.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_off000069a2.bin
4239565fb3b708efed10e29170a78d99b1fd0de0fbc935316a5828dd1fc93bc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x69A2 5740 bytes
font_01_sfnt_off00007d2d.bin
915e7bf8faac216738e01a2f7aa1edb2195b775b1f1dbcc6c2627e01322ce197
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2D 10612 bytes
font_02_sfnt_off0000a197.bin
56034361f66b2cbb672cdd79591637171ffea75261b7d95bb52ed06155cd5fbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA197 16080 bytes