Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd5ba84b741caf8…

MALICIOUS

PDF

43.1 KB Created: 2020-08-08 06:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b6504f180dd95fdf2b3d25d96ff78b5 SHA-1: 57e9e44553b7a21e898e0008c95d76a207b3a139 SHA-256: 5cd5ba84b741caf8996d608338121a97c2c8cdfd32454b6411764d2e3ba63b6a
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a significant portion pointing to a known malicious redirector. The document body, though heavily obfuscated, includes a reference to the carbon-oxygen cycle, likely as a lure. The presence of a large number of external links, including one to a malicious redirector, indicates an attempt to lead the user to malicious content, potentially for phishing or malware distribution.

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=carbon+oxygen+cycle+pdf
    • http://files.francishurley.com/uploads/1/3/0/9/130969356/putoder.pdf
    • http://files.ardorcandleco.com/uploads/1/3/0/7/130776828/rebokamewod-tanemapovatuk-pufilavoni-figigiwutiporo.pdf
    • http://nobajuk.mikebergenart.com/uploads/1/3/1/6/131606490/nuxoge-givim-pivipokagarir.pdf
    • http://files.joegrabowski.com/uploads/1/3/1/3/131398008/213d1701.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0448/2295/4141/files/epidemiologia_roberto_medronho_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/gewaligej.pdf
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/vinosubuwulakuvozizupogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5160/6435/files/59656745719.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/59257986961.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/64611954025.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tolipokegegami.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/jafavokefonezuxotuvifexi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/fawusapolimefujajokuwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/muzajufojamamofafekimot.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/97800685102.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_off00005e11.bin
72d1f495690643e0a46bd8e9976816548df4114ee69920b4ef8cb1df8d6d2c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 5136 bytes
font_01_sfnt_off00006f97.bin
4c0bea304b33321936cf8a4462a92875341d7cfd1930dc75f312acc5af1845ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F97 9956 bytes
font_02_sfnt_off000091a1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A1 4324 bytes

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