Malicious PDF — malware analysis report

Static analysis result for SHA-256 855fee177ecfc7c0…

MALICIOUS

PDF

36.6 KB Created: 2020-08-28 10:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c95504d47b1ae29c0aab5b280a1bf6d SHA-1: e72d10a3432ce6d78aef44d06abe17b0f2434791 SHA-256: 855fee177ecfc7c04388a78ef3ae0e2f85aa47a6b79c0bb0653cf849d77b89db
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to software downloads and the malicious URL itself. This suggests the primary goal is to trick users into visiting the redirector, likely to download malware or unwanted software.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=paint+tool+sai+1.2.5+full+download
    • http://files.michaelselma.com/uploads/1/3/1/4/131406149/derixaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/gobetofivoxunuxu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/free_pbr_website.pdf
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/50109022104.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/schwinn_bicycle_trailer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8458/files/57293479611.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/xuzinibis.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/74084087104.pdf
    • https://cdn.shopify.com/s/files/1/0433/5068/7903/files/32503880294.pdf
    • https://cdn.shopify.com/s/files/1/0471/0436/0598/files/speech_graphic_organizer.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4348/files/introduction_to_poetry_billy_collins.pdf
    • https://cdn.shopify.com/s/files/1/0460/2216/4639/files/old_assamese_mp4_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/eternal_atake_leak_zip.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_off00005160.bin
f1df45dab95b346187d3b743503892890174c73604eab0464f807db7930081b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5160 5240 bytes
font_01_sfnt_off00006360.bin
ddffccc78e912e85b077c464384050e1602274fff1a38162dd15b1170fe21475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 10048 bytes

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