Malicious PDF — malware analysis report

Static analysis result for SHA-256 033a6ee1f11983f2…

MALICIOUS

PDF

43.3 KB Created: 2020-08-08 04:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54be1586be9395b372739cc7fabbb94f SHA-1: c2d3e7611dc46c5cb44d917a3f77820b1f2babc6 SHA-256: 033a6ee1f11983f290d809730efd6826d6dc002da1ee2ed4271f30eb38eb9471
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document's apparent purpose is to trick users into clicking these links, potentially leading them to malware or phishing sites. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports this assessment.

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=additive+manufacturing+technologies+by+ian+gibson+pdf
    • http://files.puppyregistrationpapers.com/uploads/1/3/1/6/131636941/xisov.pdf
    • http://files.eastonhungercoalition.org/uploads/1/3/1/4/131407088/d03fa7fad49.pdf
    • http://sinuzeb.myattsfieldspark.info/uploads/1/3/1/6/131606289/7136794.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/nidenedebumomojiwigojovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tomazemajetel.pdf
    • https://cdn.shopify.com/s/files/1/0432/1411/0880/files/mifekebebivebizofupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/47711656088.pdf
    • https://cdn.shopify.com/s/files/1/0434/5397/2630/files/90539788038.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdf
    • https://cdn.shopify.com/s/files/1/0430/7425/7057/files/lunovekamijupi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/arsene_lupin_sherlock_holmes.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/96306941335.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9894/files/vagigodafozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dogazuzotefoninu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/40177681649.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_off00005bb0.bin
6da79179aa43e91fdcc8aa6c21775552f7e925c9e01b360888a7c7015a1a6143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB0 5740 bytes
font_01_sfnt_off00006f0d.bin
521fd1922203aa0d7cc54dea68d02dbfe94a6ec2f0699641fcd5a0752e4ddd59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0D 10148 bytes
font_02_sfnt_off000091bd.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 4324 bytes

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