Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cae043136aa60f7…

MALICIOUS

PDF

44.9 KB Created: 2020-09-03 04:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceae71c03742aac578d1ce0456ae99e2 SHA-1: 7ecad667fc282da76d79949a1eea8336556141ea SHA-256: 6cae043136aa60f7375fa5e72c3cb4a1e8625170cbc968bdaa10c4134c1975a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=most+recent+cdc+hand+hygiene+guidelines', is designed to lure users to potentially harmful content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, further suggesting a malicious intent to drive traffic.

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.me/wix?keyword=most+recent+cdc+hand+hygiene+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/application_form_sample.pdf
    • https://cdn.shopify.com/s/files/1/0437/9056/5537/files/post_traumatic_stress_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/43907748966.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7358/files/assistive_touch_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/1511/6696/files/bodies_of_water_in_the_philippines.pdf
    • https://static.usrfiles.com/ugd/64bd79_9f78fa67099c4f58ac277405fd615114.pdf
    • https://static.usrfiles.com/ugd/8d0191_16146b794fdf4da9bab4120445e97a84.pdf
    • https://static.usrfiles.com/ugd/229b11_be1ba088ab5041c08f75ac0be5099017.pdf
    • https://static.usrfiles.com/ugd/b8c837_37cc14b2892646c79dc8fb92c192adb8.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/science_fair_abstract.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/ravijijivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/tozudirilukomevejijatet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/best_manual_staple_gun.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_off00006508.bin
4fe9741b099d68316df4be36eeff8e27524f8b8331e0e3f202db44b82fb208c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6508 5192 bytes
font_01_sfnt_off000076b1.bin
ebc66d2dfd5fe4a8f670d678ae5119c2f70ba7ffbcfe0a9547ac16a007e426b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B1 10028 bytes
font_02_sfnt_off000098fe.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FE 4324 bytes

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