Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cdabaadda99955…

MALICIOUS

PDF

47.1 KB Created: 2020-08-07 07:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0485013d3e24a8d75ab17e970aba7009 SHA-1: 608232fe531af77e63e534898a5d2a4780479c6a SHA-256: 01cdabaadda999553e8138b0690b87957f4fa7347c79aa8835b129de89638b87
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF document exhibits characteristics of a link farm, containing a large number of embedded URLs pointing to other PDF files. One of these URLs, 'https://ttraff.cc/pify?keyword=anopheles+gambiae+pdf', is identified as a malicious redirector. The primary purpose appears to be SEO manipulation or distributing malicious content through a network of linked documents.

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=anopheles+gambiae+pdf
    • http://files.bcwine.ca/uploads/1/3/1/4/131437987/7899841.pdf
    • http://wimasuvu.northernillinoispainting.com/uploads/1/3/0/9/130969352/jeruli.pdf
    • http://files.majorlaserremoval.com/uploads/1/3/1/8/131871912/1663834.pdf
    • http://files.weathershepherd.ca/uploads/1/3/0/9/130969545/konumonexifiw.pdf
    • http://files.itsbendybo.com/uploads/1/3/1/4/131437444/vuxoxeditepifel-dajerolapanaxoz-nizinomimafikel-buxowejakoweka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/17137303191.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/jumanah_imad_albahri.pdf
    • https://cdn.shopify.com/s/files/1/0434/5554/5497/files/jifubewumipaxopefoxuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/94466585926.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/nipesewewikipabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5383/2609/files/fairy_tales_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9516/files/office_administrator_duties_and_responsibilities_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/49587775461.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1047/files/lolividujojarafom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruketisoren.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/66276604734.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/12460679771.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_off00007a2c.bin
f100072ca49889543895dfbd08db1f693c4b8e32831563063ff1d2af52aa56fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2C 5488 bytes
font_01_sfnt_off00008cb2.bin
b64d6089e4044a037ab3a84ceb6c14f0ca34bf4b4960b1e2ed066063197f8a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB2 10140 bytes

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