Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa0aba7a8645cac…

MALICIOUS

PDF

44.6 KB Created: 2020-08-12 15:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d683f27138436aa72d3c433915e1801 SHA-1: aff27d74b04d50346baf2ec54a400b856067a91e SHA-256: 2aa0aba7a8645cac36595dc34c8058dbbf446d73741e298e0318ba29d8576568
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=secretarial+abilities+books+in+english+pdf'. The document body, though heavily obfuscated, contains this URL and references to books, suggesting a lure to potentially malicious content disguised as a helpful resource. The presence of many links, including to benign Shopify domains, points towards an attempt to manipulate search engine results or distribute spam.

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=secretarial+abilities+books+in+english+pdf
    • http://files.jacobspolitics.com/uploads/1/3/1/1/131164473/ffa782301cee64.pdf
    • http://files.nowido.org/uploads/1/3/1/4/131437699/tolonibiniv-ginipiwezifug.pdf
    • http://files.americancollegeofspinesurgery.org/uploads/1/3/1/3/131382595/391162.pdf
    • http://files.thegreywitch.com/uploads/1/3/1/8/131857049/ruliwumida.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/candido_ou_otimismo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/64539159022.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/jawamoguvur.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/veketewarutagonigudabison.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/145224363.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/bewulalogumamedivakep.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/52912252492.pdf
    • https://cdn.shopify.com/s/files/1/0448/2279/0305/files/plant_virology_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f88.bin
1c34bb9ebaea4f719aa2eb5f2847533f618740a4b3bfa0be85fa4adfd18a2979		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F88 5724 bytes
font_01_sfnt_off000062e6.bin
7bb91423d63eb6bd7c2657278979848d60b7d38679106ec23dbd755ba6ab3d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E6 2320 bytes
font_02_sfnt_off00006d35.bin
6906a604c94d1b4631de3cd33f56ebc33a93142b3409aec8d0391ffc22168a05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D35 9852 bytes
font_03_sfnt_off00008f2a.bin
4362e686776cae9b5e877a8e5de4a1ff5ae9966626bcf1046762b8e3a01bbea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2A 16224 bytes

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