Malicious PDF — malware analysis report

Static analysis result for SHA-256 adabc98d7be50e51…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 11:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa4e18f6653b6f189b18b9eeb4ba82d7 SHA-1: 254def26e7122848765abe95f5a28cb1e7c9af04 SHA-256: adabc98d7be50e510c6a7b7f746f08f5f8374596eb904706ec0f4381a8ba3f9e
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a phishing or scam attempt where the user is enticed to click a link under the guise of downloading a PDF. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of the payload delivery mechanism.

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=electronic+devices+and+circuits+by+j+b+gupta+pdf
    • http://nolazunuk.cptcinteriordesign.com/uploads/1/3/1/4/131407089/1bf1f6bfe20.pdf
    • http://files.artsstudentsassociation.org/uploads/1/3/0/7/130739456/9143667.pdf
    • http://files.shantiyogaashram.com/uploads/1/3/1/4/131406149/7378530.pdf
    • http://xovafene.dchudphotography.com/uploads/1/3/0/7/130738779/d21e7.pdf
    • http://files.kathryn-riding.com/uploads/1/3/1/6/131637631/f7a0a8b1.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/latent_variables_in_psychology_and_the_social_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/1-_99_hunter_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0436/5913/3081/files/63382781980.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/wijodigezabexukanemopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/paramore_brand_new_eyes_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/air_fuel_ratio_of_petrol_engine.pdf
    • https://cdn.shopify.com/s/files/1/0429/7778/8057/files/hex_beam_antenna.pdf
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/fubufomutetogexufire.pdf
    • https://cdn.shopify.com/s/files/1/0450/3742/0708/files/acrobat_reader_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/16966617530.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_off00005819.bin
4b620b594a9c6c059004fdcb4d75fee2ca8ace3b5fb7d8198a4456056b6adaae
pdf-font-stream PDF embedded font (sfnt) at offset 0x5819 5540 bytes
font_01_sfnt_off00006b09.bin
048d308b832b59a61479963fe8d422389bc419bcac87bfbb106b9263f612260c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B09 9832 bytes
font_02_sfnt_off00008cb7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB7 4324 bytes