Malicious PDF — malware analysis report

Static analysis result for SHA-256 942925ab405063cd…

MALICIOUS

PDF

38.0 KB Created: 2020-08-29 18:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19d07d2bcc58385745817e51c8277810 SHA-1: 4bd97f2a54fab9c961509c82e1fcb88cfbccd0e2 SHA-256: 942925ab405063cd45d61fdbaac6cbcfad92fbec87d14372bc6baee6cfb9a70e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting other PDFs. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body contains text related to 'devenv exe resetsettings' and the URL 'https://ttraff.com/wix?keyword=devenv+exe+resetsettings', suggesting a lure to trick users into clicking the link, likely to download a secondary payload.

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.com/wix?keyword=devenv+exe+resetsettings
    • https://cdn.shopify.com/s/files/1/0463/1802/6917/files/69762978953.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/adblock_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/5516/1252/files/pulp_fiction_pelicula_espaC3B1ol_latino.pdf
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/las_banderas_del_mundo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/37264684562.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/special_characters_letters.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/33322898352.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/pofuvobozuvevewoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/conjunction_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/aznor_electrodomesticos_burgos.pdf
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/zijuwonuvawupis.pdf
    • https://cdn.shopify.com/s/files/1/0430/2766/0951/files/98355780838.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/bezolon.pdf
    • https://static.usrfiles.com/ugd/9e41f0_4e9ad53f1bb24c6b8553f027c7a1521a.pdf
    • https://static.usrfiles.com/ugd/b8c837_311dbce3144d43c98b3106dcf7d0116c.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa7f250a5f2542baab03e9e1c9799399.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ef510d21cea40feb2e98415b686354f.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_off00004ae0.bin
2cc7487b17db8e8127c8ff1acb9ddefed6216420f199b2cd04a26ef31e01c2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE0 4416 bytes
font_01_sfnt_off000059f4.bin
3a5800222a00a034bcb975133654da0913600ecfe7b6e1d77fd3462267e40ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F4 10236 bytes
font_02_sfnt_off00007cfd.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFD 4324 bytes

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