Malicious PDF — malware analysis report

Static analysis result for SHA-256 974b1001966d387d…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 17:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f1ad44f83c96c2d37d0ae0111cef1d7 SHA-1: ac59810bd46f726ba9b88a4f5c4966d91a7ab2bc SHA-256: 974b1001966d387da4ce24da12a10dcb33d0f612bb5579ef72f7b1dbf1fd5c62
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body itself is largely garbled but contains the same Portuguese phrase as the redirector URL, suggesting a lure. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, and another heuristic identifies it as a link farm.

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.com/pify?keyword=fun%25C3%25A7%25C3%25A3o+das+celulas+caliciformes+no+intestino
    • http://zofenek.tdcwebstercity.com/uploads/1/3/0/8/130873995/eeeba5f.pdf
    • http://files.chikuawali.org/uploads/1/3/1/1/131163780/03023.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1754/files/insert_footer_into_excel_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/centurylink_router_settings.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/problems_of_reliability_and_validity_in_ethnographic_research.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/xufetizezoxedafuxas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/dipafawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/5389096169.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/86267006248.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/debupiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/0228/8537/files/50248503978.pdf
    • https://cdn.shopify.com/s/files/1/0435/7321/5387/files/the_butterfly_effect_2_hd.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_off00005ae0.bin
9b0df35f2df02006ba9cdefc9cb322228cd3eab016262dda64e6e7f43d50b674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE0 5624 bytes
font_01_sfnt_off00006d0e.bin
cbcb9ab07340b1dd66f8dd009d287d344d719df8477c0f2bccb9944c9ee89fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0E 11724 bytes

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