Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1319678decaef3d…

MALICIOUS

PDF

81.9 KB Created: 2020-08-31 13:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 615b983c429eeb0e68a2b9c1fbf8c48d SHA-1: d058c48aa402fd032abed9fa8b2b0023a5bededd SHA-256: d1319678decaef3d916d33ae7ee8b3eadcdb8f2367ae0160c7befb9a7f558ff4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.com/wix?keyword=nof+osteoporosis+guidelines+2014, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to trick the user into visiting a malicious 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.com/wix?keyword=nof+osteoporosis+guidelines+2014
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/sovonepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42778981568.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/9th_grade_holt_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/35986666839.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1877/files/17591559526.pdf
    • https://static.usrfiles.com/ugd/ac72e0_ee76e4f1cfdd4ef8894a9475741c1dd7.pdf
    • https://static.usrfiles.com/ugd/7ff653_1a037e59a7ca4e9fb906ace1c78a17fe.pdf
    • https://static.usrfiles.com/ugd/efb3f0_b807188a89734decb602bf4356934dc4.pdf
    • https://static.usrfiles.com/ugd/d1d005_6e85e894c3d147e5a41d92054908c00f.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/fobitimezelenedevowanutap.pdf
    • https://cdn.shopify.com/s/files/1/0466/2840/5413/files/assassin_creed_games.pdf
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/metodo_burbuja_en_java.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/autocratic_leadership_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0428/0467/4727/files/rerekeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f486275499c4d1e936a1e455834fdb4.pdf
    • https://static.usrfiles.com/ugd/fa6f14_c56566b1af0d46c08601f58bbac12b7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_32bc560b756d44e78d1964fecf29cc72.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_e5ca9fbc45974f1c9f40897c14ca63a6.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_off0000fa75.bin
778849a35995dbebf0e60673aa8ca2214120ee8b0db3fdbac2d9bfd4c2ce6fa2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 5380 bytes
font_01_sfnt_off00010ceb.bin
6f5b790689d85830144f95be7976cd1ab5ce0cc513734dc399608e96c2c77432
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEB 14332 bytes