Malicious PDF — malware analysis report

Static analysis result for SHA-256 40cf22fa044577d2…

MALICIOUS

PDF

33.6 KB Created: 2020-08-22 11:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7f3de95d1be7501cd8a8f527b983df4 SHA-1: 9dd37d8fbc0aff2aef42295f1fbf6fccb27b7a22 SHA-256: 40cf22fa044577d212a854b9e4cec2ab8f79035096c0b6738e65461a93e89c95
154 Risk Score

Malware Insights

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

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, several of which are hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to the 'ttraff.com' URL, which likely serves as a gateway for further malicious activity such as phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bijli+ki+tar+song++mr+jatt
    • http://raref.km4kate.com/uploads/1/3/1/8/131856726/2647a48336.pdf
    • http://files.infinitywellnessconnection.com/uploads/1/3/1/4/131408170/sugobe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0695/files/59340270605.pdf
    • https://cdn.shopify.com/s/files/1/0458/0130/8326/files/uttarakhand_open_university_date_sheet_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/pikol.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/what_is_a._db_file.pdf
    • https://cdn.shopify.com/s/files/1/0445/6418/5247/files/wuxufogugeriga.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/27604968301.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2343/files/bopofo.pdf
    • https://cdn.shopify.com/s/files/1/0464/7606/6966/files/77409442506.pdf
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/49012437513.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/64300390429.pdf
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/wusakab.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_off00004635.bin
35e738686f8a0bc73a920c226efd436f4a2867d53e478116c34533dc9db6b0fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4635 5196 bytes
font_01_sfnt_off000057c0.bin
dda600dc9926a1cdb5e7b843df8adf903102eabb4221ff4eb293ec3766c7e57e
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C0 9968 bytes