Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ad141d9cbaa6b2…

MALICIOUS

PDF

36.2 KB Created: 2020-08-13 12:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff6e8b3baf84d81ceaef7014312b1474 SHA-1: 7a896e1ea4273591a7fc0350b098129f9e5e136a SHA-256: 41ad141d9cbaa6b27f314fe030b291a19221e7d8e2fbc21540600f88d618bc4b
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 external sites, a common tactic for SEO poisoning and redirecting users to malicious content. The primary redirector URL, https://ttraff.cc/wb?keyword=3ds%20max%202016%20tutorials%20pdf%20free%20download, is flagged as malicious. The document body itself contains garbled text but also includes the malicious URL and several benign-looking Shopify URLs, suggesting a lure for free software tutorials.

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/wb?keyword=3ds%20max%202016%20tutorials%20pdf%20free%20download
    • http://files.metallicblackrecords.com/uploads/1/3/0/8/130813876/fobagitukowe-mumogewojawiku.pdf
    • http://tofupeses.advanceprolighting.com/uploads/1/3/1/4/131482975/giwijokimusarob.pdf
    • http://gezawuno.iceoutofca.org/uploads/1/3/0/8/130873851/puxovumele-dikupevamosu.pdf
    • http://sudokefa.queensnycellphonerepair.com/uploads/1/3/2/6/132681482/386656.pdf
    • http://files.susanmckayartist.com/uploads/1/3/0/9/130968937/86d9a749e7.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/bopodebafujasamal.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/roriviwafojuxiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5682/3453/files/anticipation_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0445/8423/9268/files/search_text_layer.pdf
    • https://cdn.shopify.com/s/files/1/0430/5145/0519/files/applied_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8757/6740/files/calligraphy_letters_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/60319000049.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/bhagavad_gita_online_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/28773131431.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/99988776438.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_off00004dc3.bin
88187e63f68e4e2ca5baaaeb87d14ff9dab4bf37acbff6e17d8325342deb65ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC3 5896 bytes
font_01_sfnt_off000061d0.bin
64e72cb25321801c52ffc885244b0a6bf13163d97a3460c9b924303290590e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 9928 bytes

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