Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ed4941e6cf03ef…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 06:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6922963b0188fdc0854293fc28fa71e4 SHA-1: 83742521134d6c6d907a4294c423e3fd7559bdb4 SHA-256: 17ed4941e6cf03efeb8aa06e5c63d56b26fd6edbbf8ba13a7811b3696672633a
162 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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains a reference to the same malicious URL, suggesting a phishing or scam attempt disguised as a free download. No scripts were extracted, but the embedded link is the primary indicator of malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=fixed+on+you+laurelin+paige+pdf+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/goreg.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2273/files/90399620904.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/karrimor_ladies_jacket_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/kawasaki_bayou_220_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/vshare_for_ios_11._4.pdf
    • https://cdn.shopify.com/s/files/1/0432/4848/4507/files/wixivamewesiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/northern_blotting_techniques.pdf
    • https://static.usrfiles.com/ugd/b8c837_baf03b0f78af4595a2ef86900b87d4ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_13cec9d0f67f43a7acac605aaaaa5d1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2b0b735e20c4f308f2f9922363ccce6.pdf
    • https://static.usrfiles.com/ugd/b8c837_96fd505f73ce4c528ffd0cc23ef824c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_24aea0c63e874923a51c64b47926ef78.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d8b.bin
ea3e31b50889ee2cc1c42000cdb6c4a78e3544e63b98550cc4cf66263f896ac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8B 5248 bytes
font_01_sfnt_off00006f95.bin
ef0f01b5e05b764a0028eb5e5bc576487e1cf313ca0c447b2dc049598e57d224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 14172 bytes

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