Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfcfaa0a8d91684…

MALICIOUS

PDF

51.1 KB Created: 2020-09-01 06:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4519c33fac3791c6cba7787c45d8fa04 SHA-1: 8e8e7394bd6458820614b66a8615d109779a61d5 SHA-256: 5cfcfaa0a8d91684b512b633397f0541ea01b96ced0f53575367f466ad434983
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=rubber+material+selection+guide'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to a malicious site via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=rubber+material+selection+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/5d2cf3_51da1885f32d4b1c8066a8049b094bab.pdf
    • https://static.usrfiles.com/ugd/bf650e_a3a112cd8f19400490e8b3e091258014.pdf
    • https://static.usrfiles.com/ugd/0c41e7_c95bc3ecec0e4bb79c06763989aca26d.pdf
    • https://static.usrfiles.com/ugd/b6edda_fc2caa116d70458d9536711235019df7.pdf
    • https://static.usrfiles.com/ugd/314c35_c99267d93899471cb44610af8eb1f7bc.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/70353003881.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4421/files/how_to_buy_a_house_in_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6046/0706/files/biology_book_for_class_9_sindh_text_board.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/75307964670.pdf
    • https://static.usrfiles.com/ugd/b8c837_89ad23fa5c5d4c0ca8e745aeb109c8d4.pdf
    • https://static.usrfiles.com/ugd/3dd68e_8e847d53765d4825809d69cd856f4165.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0503/files/65653351159.pdf
    • https://cdn.shopify.com/s/files/1/0437/9777/4497/files/xisikiduzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/ontslag_van_werknemersbrief_steekpro.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071a8.bin
60d5eece135c9c131d38ec72caac414d708e69400c1048eccd64f8f20dc26712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A8 5288 bytes
font_01_sfnt_off00008377.bin
45b13b711161ac1286bd6d4af62fab8d023291576282c3c50110b07d25234693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8377 15040 bytes
font_02_sfnt_off0000b167.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB167 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.