Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f669522d15c0781…

MALICIOUS

PDF

35.9 KB Created: 2020-08-29 19:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98aea3eb37b5f742798433b05d6d2008 SHA-1: 8734dc7a701625c3d1a753908c15d3562a91268b SHA-256: 2f669522d15c07814394bba2e3e14026432f4e094e6e6b8d77f31f3bc3274a95
150 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous embedded URLs. One prominent URL, 'https://ttraff.ru/wix?keyword=billy+joel+sheet+music+new+york+state+of+mind', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting an attempt to manipulate search engine results or lure users to malicious content. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=billy+joel+sheet+music+new+york+state+of+mind
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/aptitude_test_papers_sri_lanka_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/adenine_synthesis.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3643/files/application_for_accessible_parking_permit.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/pusuresegozubilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9443/files/affair_elly_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/girl_like_you_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8506/files/72714055782.pdf
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/17049733560.pdf
    • https://cdn.shopify.com/s/files/1/0439/8471/5934/files/uc_browser_apk_online_play.pdf
    • https://cdn.shopify.com/s/files/1/0435/6374/5441/files/german_basic_grammar_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/kofom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/32904717317.pdf
    • https://cdn.shopify.com/s/files/1/0440/3773/4550/files/asma_ul_husna_urdu.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5d7dc1cfffc4c32bd88f0a002258f45.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_9ccd720bd03a466888d15fadbebb549e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6fa9a903a1f4da1a6b4070563175ce3.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc49fc282ce94bc688b41131689e017e.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_off00004d22.bin
4ba1519c8a3091638fb2f845ca26b78b10b6fec5b564b9d72d6b9adafca77931
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D22 5644 bytes
font_01_sfnt_off00006042.bin
3c6496cf781f34f2bb761bade3d5f88848d6473e7c5fed1e1b644c18773be0da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6042 9912 bytes