Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b95d57d1414722…

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 01:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dac42bd4b7e8470c40d41892927649c8 SHA-1: ae51d06092ee40a007207666f01cfe2b851454a9 SHA-256: 52b95d57d141472286f8e9ceda08c9228c56174461a6a593c1438390ece9eb74
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links, but the primary redirector is suspicious. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and a reference to the 'ttraff.com' URL, suggesting an attempt to lure the user to a malicious site.

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=a+darker+shade+of+magic+tv+series
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/54058996767.pdf
    • https://cdn.shopify.com/s/files/1/0461/9498/3075/files/ragnarok_mobile_creator_build_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/73953861707.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/43167344173.pdf
    • https://static.usrfiles.com/ugd/b8c837_72ae4956e8f64808af31c29f675bcc92.pdf
    • https://static.usrfiles.com/ugd/b8c837_889bbe83afd54d46bbfef5d9a3a0254c.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/kokorilibuvudenekamazado.pdf
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/camera_lucida_roland_barthes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/arabic_food_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/guidepost_montessori_at_prosperity_reviews.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3688d69465f4086acd3acd9e7f4a155.pdf
    • https://static.usrfiles.com/ugd/b8c837_14ff98af2433439eacffcc91ab3a4e19.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51eb82ffb154d6ea71517379899237c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c87ea941250c487e8e6f9527c2a4aff2.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_off0000621d.bin
8216a7ab1680a79e19239b68e42c60fc4b94d4c8b6e245a0a14265f8530ca75b
pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 5516 bytes
font_01_sfnt_off000074c7.bin
c15fe47bb8a2b8389c7dd6cf74e654adb28703f388d2834d21455d99e00dcce4
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C7 10444 bytes