Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e20b7b3592eaf9…

MALICIOUS

PDF

41.7 KB Created: 2020-09-20 03:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 681e0fd3e6d12c0b108e560664b9838c SHA-1: f18c68545f19e7ecfe4cb90edaa51f317339dea8 SHA-256: 39e20b7b3592eaf93b626e4a7609e29cab986a9a3b0a78632e7e0450f128e159
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.club/wix?keyword=family+gift+sharing, is identified as a malicious redirector. The document body itself is heavily obfuscated but contains the same redirector URL, suggesting the primary purpose is to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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.club/wix?keyword=family+gift+sharing
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/12223573696.pdf
    • https://cdn.shopify.com/s/files/1/0465/4530/5750/files/58661359246.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/14872763489.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/teaching_strategies_in_mathematics_for_secondary.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/gofetuleviliwupomarofab.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/omr_answer_sheet_100.pdf
    • https://cdn.shopify.com/s/files/1/0435/5696/2467/files/18659657582.pdf
    • https://cdn.shopify.com/s/files/1/0464/7210/2056/files/97186015379.pdf
    • https://cdn.shopify.com/s/files/1/0435/5053/9940/files/openfoam_user_guide_version_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/crash_bandicoot_ps2_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0484/5243/6118/files/98112697368.pdf
    • https://cdn.shopify.com/s/files/1/0431/6292/7253/files/wejiwivezovaminezojeju.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/analog_and_digital_signals_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/2_digit_addition_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0431/2871/7463/files/69430941082.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_off0000653e.bin
a8d55f036e538fad8555e6d4b4120ec4c580d5cf99892f3aafeffeace7b9a8d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653E 5236 bytes
font_01_sfnt_off000076f8.bin
ef828ebb9d1f7fb1af2002657f25adb97cf50123b0d6228f675cfe76bee9bfb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F8 10212 bytes

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