Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f294ea66fba7df…

MALICIOUS

PDF

33.8 KB Created: 2020-09-19 07:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 452da61b14a61c80e661694901b111c7 SHA-1: 8dbfb5fc89e359001be22dcadab01402f06600ca SHA-256: 97f294ea66fba7dfc0917072ff83dc0f8f861b966395f4cb9843fd03ea379438
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a 'PDF link farm'. One critical heuristic indicates a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=tera+lancer+guide+reddit'. The document body, though heavily obfuscated, also contains this URL. The primary purpose appears to be SEO manipulation or user redirection through a large number of linked PDF files.

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.club/wix?keyword=tera+lancer+guide+reddit
    • http://files.ulclcy.org/uploads/1/3/1/3/131398504/f46b106abfe8.pdf
    • http://files.theblackribbonart.com/uploads/1/3/2/3/132303181/4f1c131.pdf
    • http://mogojafim.emmarainewalker.com/uploads/1/3/0/7/130775734/f82b0a21229f387.pdf
    • https://cdn.shopify.com/s/files/1/0432/8256/3232/files/79489504356.pdf
    • https://cdn.shopify.com/s/files/1/0479/3273/5655/files/medusa_and_the_blind_man.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/barcode_number_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/business_law_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7587/0630/files/20511689415.pdf
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/97604576144.pdf
    • https://cdn.shopify.com/s/files/1/0480/1314/8319/files/kujupifow.pdf
    • https://cdn.shopify.com/s/files/1/0438/3794/8061/files/south_bronx_academy_for_applied_media_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2864/files/purojapumitotakopaxuju.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/punaxusidawosisoregov.pdf
    • https://94391ebf-407e-4027-95b5-11a9965e524f.filesusr.com/ugd/479fa9_24db981a623349df83114f2c64dac7d8.pdf?index=true
    • https://df345123-b0b3-4fbe-996c-02fbb9f6dbca.filesusr.com/ugd/37321e_c23d95081807456fbbfe699e7a3b2568.pdf?index=true
    • https://e84f3809-7558-42e3-ab30-b5217eae40b8.filesusr.com/ugd/89c6ad_453d6b8640dc4ebf895b8fb15c8a0408.pdf?index=true
    • 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_off0000498c.bin
ef5e9635f0df7c92b724f19f538f4bd49ff901c885a458e09e28e8804662a7f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x498C 4880 bytes
font_01_sfnt_off00005a2a.bin
0ae648b8c2aa110b14bb1cf09acdfead53cd245118e915a0868ff4732175bf51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2A 9656 bytes

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