Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3e04096dc2bc9b…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 07:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c2f771241e18e8bec72e3c15a38be45 SHA-1: e31fe7c5aa64e5f872588e3627bbb401b2437309 SHA-256: 8f3e04096dc2bc9b9c5b40536a6d0fbb7226ab14c3f8076f166165d1dee07493
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to a URL designed to trick users into downloading further content. The document body, though partially corrupted, contains text related to an 'earned leave application format' and the malicious URL itself, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy.

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=earned+leave+application+format+for+office
    • http://sanat.mattandrachelmcmillan.com/uploads/1/3/1/3/131380213/petijajuwog.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/vopapinuzatuve.pdf
    • https://cdn.shopify.com/s/files/1/0432/1450/4093/files/18473212394.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1906/files/singer_stitch_sew_quick_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/fefagobaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/64807643182.pdf
    • https://cdn.shopify.com/s/files/1/0438/6432/6309/files/dupoganuzupupizuso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/7678856723.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6231/files/solvency_ii_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1189/9545/files/kipuben.pdf
    • https://cdn.shopify.com/s/files/1/0431/0630/4153/files/surgery_absite_review.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8002/files/finoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/top_platform_games_2018.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_off00005efd.bin
053c89679b67d3cff2f1bd97027ecc0a40148ba847095657803bb9b93498037e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFD 5140 bytes
font_01_sfnt_off00007067.bin
11d708004b0f26ca9afe6fa8ba4b6f3a265d301b0875b0d06309685552ac4198		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7067 10396 bytes

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