Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbe037ca83e6dd0…

MALICIOUS

PDF

45.8 KB Created: 2020-08-19 04:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc0bf2b5e1f3ebdd34380e0f0150a01 SHA-1: 2bc266e1f35009e157233bd9e6caccd115755841 SHA-256: 5cbe037ca83e6dd013c88561ddf7bc3c9a6531bd545f850b89f17274ef75b8b7
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'adb install multiple error android studio' and a URL pointing to 'ttraff.com', suggesting a lure to a malicious site. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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=adb+install+multiple+error+android+studio
    • http://nomaxo.10and10onthego.com/uploads/1/3/1/1/131164239/zoxixomaralat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/99675113351.pdf
    • https://cdn.shopify.com/s/files/1/0433/9122/1911/files/56881683361.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/cerebral_venous_sinus_thrombosis_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/93147607701.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/naxapalol.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/ruwakazosatusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/lujopunazimot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/mabudaxem.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/50366218139.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9913/files/best_beat_rap.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_off00006d4f.bin
a0990c1ac471a36b6fec7e7625be7b260f9a926d3117da14745bd2bc8fc9b2ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4F 5236 bytes
font_01_sfnt_off00007ef4.bin
fa80efab3032da6f1e05c4bded9c41b03b5a29661609fefe931e7e5576244336
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF4 13504 bytes