Malicious PDF — malware analysis report

Static analysis result for SHA-256 06afe10d09b50b0d…

MALICIOUS

PDF

52.2 KB Created: 2020-08-24 02:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c72c0e1f499fe5f43b0dc732cdbdc00f SHA-1: ddaaa39d05a147ae599dd62907c111300072e889 SHA-256: 06afe10d09b50b0dd24919ba1afe5fbe3d5465245eec8f8fcdde308a35995559
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, forming a link farm, and a critical heuristic identified a redirector link pointing to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to redirect the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=combiner+deux+pdf+ensemble
    • http://files.kobanuniverse.net/uploads/1/3/1/3/131381374/tajorez.pdf
    • http://files.auroraworkshops.com/uploads/1/3/2/6/132681901/subugosujet-rokanufijevijek.pdf
    • http://divivawa.dahlbergdynasty.com/uploads/1/3/1/4/131438003/6332454.pdf
    • http://files.comfortsofhomepetcare.com/uploads/1/3/1/4/131411688/8051200.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/fawidebanego.pdf
    • https://cdn.shopify.com/s/files/1/0434/4905/7430/files/9935029629.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/interview_rating_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/2709/5967/files/zomowiga.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4162/files/42489217617.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/binary_logic_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0077/files/avid_virtual_instruments_pro_tools_10.pdf
    • https://cdn.shopify.com/s/files/1/0447/2451/9066/files/anaganaga_aravinda_sametha_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/wipinidasasopemuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/67077210852.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8060/files/jidumirizanopoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/kinesio_taping_for_tennis_elbow.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087ab.bin
13adb09bc2c8b76d5c142ba11f18056f0cafb71733ea971711dd78b9c2b07787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AB 5092 bytes
font_01_sfnt_off000098de.bin
e53b9936c3b798f387a0a09f875ca765c7d0edd1589668e442cd52766d2b4ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98DE 13292 bytes

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