Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b0101680b45814…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 14:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c281ace838a09e225a24d0199f80ccd5 SHA-1: fc88fcbd1447e0e8b9c91fc1e4cd8b83d223bf18 SHA-256: 88b0101680b45814e6b5a27b49fbfb7d0e328e7e3dca492a9defb03477437e5c
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=datasheet+arduino+uno+r3+smd'. This URL is presented within the document body, disguised as a datasheet for an Arduino Uno R3 SMD. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to the malicious redirector.

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/pify?keyword=datasheet+arduino+uno+r3+smd
    • http://files.pithpo.org/uploads/1/3/0/7/130776037/bd51f6fdcaa440.pdf
    • http://kuxata.elgintreepros.com/uploads/1/3/0/7/130775286/luxena.pdf
    • http://files.hoperadio.ca/uploads/1/3/0/7/130739028/7151151.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/bookkeeping_for_dummies_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/331909684.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/76820540895.pdf
    • https://cdn.shopify.com/s/files/1/0437/5291/5098/files/double_elimination_bracket_5_teams.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/15665976608.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/82991130874.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/defibomavovedolexovikel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8761/6413/files/rondo_capriccioso_saint_saens.pdf
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/autonics_tk4s-_14rn_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/mivovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dijupabexapuvasazanuripik.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_off00006792.bin
a991e52512e0e52463c4b6387f53b07eae5bf7498cf718dabe2770b54485770e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6792 5080 bytes
font_01_sfnt_off000078a2.bin
327507a23a126dbceeca751c9ad8d8356e632d7a7cbcbdf26bfd709f8b332aa4
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A2 9948 bytes
font_02_sfnt_off00009aa7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA7 4324 bytes