Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87130b54b525780…

MALICIOUS

PDF

47.2 KB Created: 2020-08-23 00:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4779095f39ad9939cca6faf251de6448 SHA-1: 491b5160a0c4bd9f1f344c0d616ac06824cad969 SHA-256: a87130b54b5257806180f6d0b63fcd0b23142b209b0d03d426012adb4837df59
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=joining+report+application+for+job'. The document body, though heavily obfuscated, contains text that appears to be a lure for a job application. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is likely intended to lead the user to a phishing or malware distribution site.

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.ru/pify?keyword=joining+report+application+for+job
    • http://files.fserravila.com/uploads/1/3/0/7/130740438/garekovejagukeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5528/4378/files/35777072686.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/78433771324.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/bemek.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/dokinagen.pdf
    • https://cdn.shopify.com/s/files/1/0435/8085/0335/files/yoga_for_knee_pain_relief.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0086/files/andhra_pradesh_districts_and_mandals_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/63924370249.pdf
    • https://cdn.shopify.com/s/files/1/0460/7148/0484/files/kikam.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/76887480096.pdf
    • https://cdn.shopify.com/s/files/1/0429/8883/0873/files/91465198654.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/git_remove_upstream_branch.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_off00006abf.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 6744 bytes
font_01_sfnt_off00007ba4.bin
3975eaffc3816f27bba37ca186ef28e0d5521f919c5cb4cd18e8701f3954cc68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA4 5208 bytes
font_02_sfnt_off00008d6c.bin
eaadf753a2c36d8fe0eb699e43652081cd677480cd9977e537f342954b8e0321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6C 10124 bytes

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