Malicious PDF — malware analysis report

Static analysis result for SHA-256 7924c98a045e36b6…

MALICIOUS

PDF

43.9 KB Created: 2020-08-19 03:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e66d0ec46c07134c7aa561c47975e6ab SHA-1: d6847636b3883e56fa43b22cecae7b10667c5fa2 SHA-256: 7924c98a045e36b63077abd125c71ddc30bedec1391467e20cc512243e1d17e2
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files, masquerading as an aviation weather report. One of these links, https://ttraff.cc/pify?keyword=clarksville+aviation+weather+report, is identified as a malicious redirector. The document's structure and the presence of many links suggest a link farm or SEO abuse tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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.cc/pify?keyword=clarksville+aviation+weather+report
    • http://files.pianolessonsbyjulie.com/uploads/1/3/1/3/131380868/59baef08.pdf
    • http://gupew.hunniebutter.com/uploads/1/3/2/6/132681513/tuzejobobuxose.pdf
    • http://files.hh4j.org/uploads/1/3/1/6/131637014/9867935.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/99622906099.pdf
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/92274413097.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/potexafepozofokadozikobom.pdf
    • https://cdn.shopify.com/s/files/1/0429/6146/9599/files/xuburase.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/21256251243.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/56183130683.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/48065938975.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/12769782446.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/gutojakiremewazin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052fe.bin
46f430285c2f3351afa6d111e990cac5ac61134676885401f413a430e0936585
pdf-font-stream PDF embedded font (sfnt) at offset 0x52FE 4932 bytes
font_01_sfnt_off000063ce.bin
5153925c60624e392f5de16c2ded6fdffb097f035d699328dbecda15f8d8361b
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 15112 bytes
font_02_sfnt_off000092a3.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x92A3 4324 bytes