Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1065327bf8e6ba5…

MALICIOUS

PDF

47.9 KB Created: 2020-08-10 09:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eba1b4fe2c6e55548780ff75cb87c67b SHA-1: b6f0db5a2e06c2a1989d7b1c6840ef29312746f6 SHA-256: c1065327bf8e6ba5012796237ae753dfd5e8f472e02e903d2e163914a13a93df
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body itself contains garbled text but also includes the target URL and several Shopify-hosted PDF links, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the PDF structure points to a redirection attack.

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=cerere+in+casatorie+cehov+pdf
    • http://totiw.7drumcity.com/uploads/1/3/0/8/130814328/4d8fac4c778249.pdf
    • http://files.nightingalemedics.co.uk/uploads/1/3/1/6/131607575/6437952.pdf
    • http://files.jpsousanhsband.com/uploads/1/3/0/8/130873987/lemolakasivoroxal.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/jewevujonimoridefuzuse.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/xapimobizakup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonub.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/lirorafibipolamimidini.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3383/files/38526626998.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1034/files/4994462984.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/13085591465.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/roxifivafejimaxovas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/7177110097.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/winx_dvd_ripper_platinum_key.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057e7.bin
629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
pdf-font-stream PDF embedded font (sfnt) at offset 0x57E7 6440 bytes
font_01_sfnt_off000067db.bin
7e193f400cb85e6a2bd2cd79783312b5abcc6763a3b1283efaecffcc404bf731
pdf-font-stream PDF embedded font (sfnt) at offset 0x67DB 5176 bytes
font_02_sfnt_off00007977.bin
b16916caf30bdab84b7e5a7e9118aa9ea18d2e091c926c29048d90d6f6bd3fab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7977 10644 bytes
font_03_sfnt_off00009da7.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA7 16036 bytes