Malicious PDF — malware analysis report

Static analysis result for SHA-256 bacb407276cf932f…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 07:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c18718f74935a09757e795c4f142d41b SHA-1: c0141305bfbd89df1940b188d5c63aa91ba68c6c SHA-256: bacb407276cf932fa5a2c6d95b837dada2b58d7da91766f37382f5dcaae7c8f3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One prominent link directs to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, reinforcing the intent to redirect the user. 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.com/wb?keyword=multiplying%20and%20dividing%20fractions%20worksheets%20for%205th%20grade
    • http://files.millsparkbands.com/uploads/1/3/0/8/130814189/ruzip-xumujug-mujakezej-xasudebefeluk.pdf
    • http://files.protelosgroup.com/uploads/1/3/1/3/131380600/7555684.pdf
    • http://files.speakems.com/uploads/1/3/0/7/130775980/xigemuto.pdf
    • http://files.newmountcalvary.org/uploads/1/3/0/9/130969322/vivadapurowusepin.pdf
    • http://fubudep.wotta.co.uk/uploads/1/3/0/8/130874038/1bee1a90e4c5.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/68137099644.pdf
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/murarokob.pdf
    • https://cdn.shopify.com/s/files/1/0430/3080/6679/files/60722404544.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/budusefukakumuxanatudep.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/learning_english_games.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/vozigodapimiwuzixiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/soketeteforabutiketipu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0553/2569/files/pufigexiletevopowodojubus.pdf
    • https://cdn.shopify.com/s/files/1/0433/4436/3678/files/temoxabitudovakojazuti.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/r_kelly_dedicated.pdf
    • https://cdn.shopify.com/s/files/1/0440/1761/4998/files/bepenejupokulabene.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/41811647694.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/30266637170.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_off0000641c.bin
63bd6ffeaf7553c91da52c2ed108d246470f0b106edbc629b0e280e653706b72
pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 5864 bytes
font_01_sfnt_off00007840.bin
c3d56b2d492a45359c8028c31b7aaa7e437eefa3a32bbdd363848cbe4ef5d0de
pdf-font-stream PDF embedded font (sfnt) at offset 0x7840 10364 bytes