Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e85703178ee9c7…

MALICIOUS

PDF

38.6 KB Created: 2020-08-31 00:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06bf002c1af7b2e8557b492fcf7ffe5d SHA-1: ee5324b36f9cf7d0d2c80a3a083712c76af1cf26 SHA-256: f7e85703178ee9c730bb7ad10d4f74ef1aaab02b2553f2853f4f9fc61ed7ac7b
150 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 pointing to Shopify domains, which is indicative of a link farm. One of these links, https://ttraff.com/wix?keyword=material+didactico+primaria+tercer+g, is flagged as a malicious redirector. The document body is heavily obfuscated, but the presence of these links strongly suggests an attempt to direct users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=material+didactico+primaria+tercer+g
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/barujexuvariroseta.pdf
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/91239638460.pdf
    • https://cdn.shopify.com/s/files/1/0459/8697/1815/files/spider_man_ps4_guide_gamefaqs.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/best_build_for_kodi_2016.pdf
    • https://static.usrfiles.com/ugd/b48b60_1a1a8663d45c48a5a396612b18f026bb.pdf
    • https://static.usrfiles.com/ugd/c0b427_f18c9fae37334dfe9722a2709f831b9c.pdf
    • https://static.usrfiles.com/ugd/f09a9d_a6d130e6d97747eba1df939f86a892b5.pdf
    • https://static.usrfiles.com/ugd/04e6f9_50cbab829b1f4c5c912eebf84716f2e8.pdf
    • https://static.usrfiles.com/ugd/b7ed05_c9d7e5751530463aa1ffa9d00d77f0ab.pdf
    • https://static.usrfiles.com/ugd/34e21e_0b9d7f8afc5248088237326096833e73.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/alcoholic_whatsapp_status_video.pdf
    • https://cdn.shopify.com/s/files/1/0438/5737/9488/files/endogenous_processes.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/nekexesezadukegowanopid.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_off00004ae3.bin
e54e69c9a2f261d33af62dc531eae9a6dbdcd8e79bf7312da854088ff98e249a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE3 4900 bytes
font_01_sfnt_off00005b8e.bin
d0930f17fcdaaa459a93fa95f36a710bd69f974120f0f003f13eb7f600971bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8E 11128 bytes
font_02_sfnt_off00007f4b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4B 4324 bytes

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