Malicious PDF — malware analysis report

Static analysis result for SHA-256 374838509505b870…

MALICIOUS

PDF

66.5 KB Created: 2020-08-08 20:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9be1196593b456c201793958730b27de SHA-1: f2d1169bb4ec1d5aa2501065f7402e6e908367f3 SHA-256: 374838509505b870338efed00e8e810b2b5b935417a8c6f30d4bf58506e18ddd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the primary malicious URL and references to other benign-looking PDFs, likely to mask the malicious activity. 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.com/pify?keyword=risk+management+plan+example+pdf
    • http://files.kansascitytruckandtrailerrepair.com/uploads/1/3/0/7/130776254/xibimo.pdf
    • http://files.seniorsmomentphotography.com/uploads/1/3/1/6/131606208/48ad1e5a4.pdf
    • http://files.blackbusinessexpo1.com/uploads/1/3/1/4/131409200/4d9a0b36de.pdf
    • http://files.marjattakaukomaa.com/uploads/1/3/2/7/132740540/fevutabow.pdf
    • http://files.michellejurkovich.com/uploads/1/3/1/4/131438111/varox.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9361/files/72624672375.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/escoliosis_angulo_de_cobb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/28657482701.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/dikaxuxowaruxepi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8442/2051/files/badinununabamoreto.pdf
    • https://cdn.shopify.com/s/files/1/0437/9528/4130/files/zebomasafetezikezunozuri.pdf
    • https://cdn.shopify.com/s/files/1/0429/5350/6969/files/the_unit_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3178/files/21561346203.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/mojoverikikixepavalov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/fajamerelefudesilalase.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/kawizasivogefudojoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/lurigoribunejupadosatawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mogapusezonoxifetomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/gogujunifegibuxedajexik.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2023/files/32556541973.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_off0000c637.bin
83ab4ff74bb96b83b002a68d24de1144b1237bd2dccc854f513501dd1ad3b5e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC637 5404 bytes
font_01_sfnt_off0000d89a.bin
1205e39fc30ddbf0357f765caab3e716bde1cd18b1a744bde66f4158d96638df
pdf-font-stream PDF embedded font (sfnt) at offset 0xD89A 10504 bytes