Malicious PDF — malware analysis report

Static analysis result for SHA-256 e783a42547564ee9…

MALICIOUS

PDF

50.5 KB Created: 2020-08-07 09:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f2ca65d4051d3cc2cd1ec8cdb20c095 SHA-1: 8fc2b21503dd42e2e32771af11cdeeda47e6cc78 SHA-256: e783a42547564ee9cdc4328eb455fa9a8fd8530b45c5b8a8f9e2ce9da704a3fc
120 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'introduction to public finance textbook pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. This suggests a social engineering lure to drive users to malicious sites.

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.com/pify?keyword=introduction+to+public+finance+textbook+pdf
    • http://wufojit.georgerichards.net/uploads/1/3/1/6/131637881/e22c92d.pdf
    • http://files.gvstclub.com/uploads/1/3/1/8/131871864/mazisesat-koturekasas-kuvalusexitoro-tesutewage.pdf
    • http://files.lisaspykers.com/uploads/1/3/0/7/130775033/d555a.pdf
    • http://files.nashvilleperformancepsych.net/uploads/1/3/2/6/132695644/xinivitidilunepososu.pdf
    • http://files.wendyrobinsonwow.com/uploads/1/3/0/7/130776791/fdb8abea7bd6626.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8392/files/10121681859.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/voforafok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/34048005765.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/26243770266.pdf
    • https://cdn.shopify.com/s/files/1/0429/4089/1292/files/togilubirojabuberip.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/84580210116.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/77444895620.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/ama_road_rport.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/kovizex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0431/7066/0508/files/mikilaxobuxexelumujilume.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_off00008958.bin
c7ddeb4446a234903da9097beb75dc862a65b8e67104965d16236fb7bc850eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8958 5180 bytes
font_01_sfnt_off00009b05.bin
ad92a7c3d857be8d6a21fbc720c70b23a2478d4dca24c113f9513e9457aa934e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B05 10032 bytes

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