Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b7dd896a1e2440…

MALICIOUS

PDF

44.8 KB Created: 2020-08-28 07:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fdfe31aa6b8ad372585aabe455be650 SHA-1: 414d6c3f34723eab0e9b14527cb497df3dd4f8b2 SHA-256: f7b7dd896a1e24401deed29403096719fda2ff78500537383708a3ea57148526
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 PDF files hosted on Shopify and other domains. One prominent link, 'https://ttraff.cc/pify?keyword=do+d3+athletes+sign+a+letter+of+intent', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to athlete recruitment and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=do+d3+athletes+sign+a+letter+of+intent
    • http://files.inthehoopbysher.com/uploads/1/3/1/4/131437311/sujulow-likowap.pdf
    • http://dejijopug.veritas-society.org/uploads/1/3/0/7/130739835/6506534.pdf
    • http://kadodevi.adelantechc.org/uploads/1/3/2/6/132682878/siwiruba-lebuduj-bunibuzowiwo-vofuxa.pdf
    • http://goleji.annawitte.org/uploads/1/3/0/7/130776367/48aa61.pdf
    • http://files.yogashak.com/uploads/1/3/0/9/130969910/zevuru.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/magna_carta_tears_of_blood.pdf
    • https://cdn.shopify.com/s/files/1/0460/7190/6468/files/3d_shapes_and_2d_shapes_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0461/9223/0558/files/best_reader_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0448/4795/6130/files/python_multivariate_normal_distribution.pdf
    • https://cdn.shopify.com/s/files/1/0437/3728/4762/files/buzosepiriwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7037/files/gungeon_gilded_bullets.pdf
    • https://cdn.shopify.com/s/files/1/0464/6466/3704/files/background_check_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/3476235630.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8104/files/57501109520.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/my_first_britannica_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/2566267504.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/vetetulox.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_off00007177.bin
b29414bb8c53f3318c2a7b7c7c9a14e8863985d18e25eecc62af219a332e17b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7177 5332 bytes
font_01_sfnt_off00008392.bin
06a943973513d727f26b581d0e660fa8f00d41c351bba25366e1d04133f96848
pdf-font-stream PDF embedded font (sfnt) at offset 0x8392 10120 bytes