Malicious PDF — malware analysis report

Static analysis result for SHA-256 162431267e7536ce…

MALICIOUS

PDF

44.7 KB Created: 2020-08-03 01:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6283ea85900f89650e470d9c977bc42e SHA-1: 60e977d44e9963214eac5ca487a1777b6f397aa0 SHA-256: 162431267e7536ceb922733b12528d0cf64eda853b69610a73c4c71ad544af86
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to serve a second-stage payload. The document also contains a lure to copy and paste content into a command-line interface, indicating an attempt to trick the user into executing malicious code. The presence of numerous links to Shopify-hosted PDFs suggests a link farm or SEO manipulation tactic to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/pify?keyword=stihl+br600+parts
    • http://files.peoplespotato.com/uploads/1/3/0/8/130814187/wuzudewiw.pdf
    • http://files.thomascreekbaptist.com/uploads/1/3/0/9/130969472/vemowo.pdf
    • http://files.brightstarastro.com/uploads/1/3/1/8/131856492/8872450.pdf
    • http://files.rochonsands.net/uploads/1/3/2/6/132695445/2970b2d484bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/vumofevisajumomujaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7564/9180/files/tixumip.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/battlegear_mod_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/gubeji.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/hamilton_beach_slow_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/copy_file_terminal_mac.pdf
    • https://cdn.shopify.com/s/files/1/0436/3180/4574/files/starting_out_with_c_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/nonijozado.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/63971881124.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059f6.bin
5ab32e2f2454ca17ae499b8ec5d550fa6419715f2633bcd5002d27380eded902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F6 5444 bytes
font_01_sfnt_off00006c62.bin
4974a119e55f4d24b6dccd1d86700806af4b8e11a5a9a38f865d280a6b9a648d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C62 10592 bytes
font_02_sfnt_off000090d1.bin
73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D1 16204 bytes

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