Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3a45f5a23e49d0…

MALICIOUS

PDF

43.0 KB Created: 2020-08-22 10:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c65073c604b41cf1cfdc0926e88ee76 SHA-1: 2077eb088e475000e5cbe8d9fea0d6f7482c00fc SHA-256: ec3a45f5a23e49d0352d23a365f5c29e4a0da753c88c86dc4410b7cdf20b8dd1
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. Additionally, a PDF SEO link farm heuristic fired, indicating the presence of numerous external links, with the first one being a Shopify URL. The primary attack pattern involves luring users with the promise of free academic books to a malicious redirector.

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.cc/pify?keyword=academic+books++free
    • http://paradize.surfdontfall.com/uploads/1/3/2/6/132681670/2578397.pdf
    • http://gifesemus.mohannadgharaibeh.com/uploads/1/3/0/7/130775565/f09d8615c3762.pdf
    • http://wizixov.criminalshateus.com/uploads/1/3/2/6/132680813/1721567.pdf
    • http://mafid.guesteyes.com/uploads/1/3/1/6/131637419/896619.pdf
    • http://files.evaslebanesecooking.com/uploads/1/3/0/7/130740357/dozepate.pdf
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/rubezapafapagabodomuto.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/2124394747.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/22380819608.pdf
    • https://cdn.shopify.com/s/files/1/0438/1347/0365/files/blender_shortcuts_2._8.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3811/files/varrock_easy_diary_osrs_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/ap_process_in_sap.pdf
    • https://cdn.shopify.com/s/files/1/0462/7346/2434/files/sawimumemux.pdf
    • https://cdn.shopify.com/s/files/1/0435/8796/0989/files/install_github_windows_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0449/3528/2856/files/1989_ford_f150_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/7673941113.pdf
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/booklet_design_vector_free.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_off00006aed.bin
6fe441f1176dda99eb56bd6a2d78a6de9bec56a274a10f01176c3429afc64c35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AED 5328 bytes
font_01_sfnt_off00007cea.bin
5befcd3a084fc074625fa3b1dc0b5a37f28c31f09edb4d68ce9e45097b91c0fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEA 10144 bytes

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