Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfa80b804f7e584…

MALICIOUS

PDF

40.3 KB Created: 2020-10-05 20:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5ee2c9c29853e266941a007004aa0c38 SHA-1: 85cdd33b6d707b04500147a8fefddfcccf534895 SHA-256: 5bfa80b804f7e584424b6479125888e40d5a09ccd6413a4ecbb6be606226bc99
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the PDF is designed to lead users to malicious content, likely a phishing page or further malware.

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.club/pify?keyword=economic+study+guide+pdf In PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/44261498821.pdfIn PDF document text
    • https://site-1040775.mozfiles.com/files/1040775/53332486265.pdfIn PDF document text
    • https://site-1037205.mozfiles.com/files/1037205/tesokowuxasoguxave.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/totogedewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0114/6274/files/inverted_pull_up_muscles_worked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2887/5934/files/dwarf_lop_rabbit_colors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4724/6760/files/ttsd_google_docs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/xapamej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0017/9105/files/zavag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647e5eee-d188-46f6-b954-eb1d2e07e76c/kobuxovuzaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2979/7787/files/linksys_wrt310n_v2_firmware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1484/4327/files/zakawiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/9343959096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/total_conquest_offline_apk_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/ramen_noodles_calories_chicken.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEE 5196 bytes
SHA-256: 7fdd8c6663fbaf6f31e4d217f833e66a15d7fa66b3aca9ac0c9f36631e469eeb
font_01_sfnt_off000071a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A7 10128 bytes
SHA-256: e7fc81652eb0e44c656ca4f4e13c0dacbffa766ebe121fbb43c9452361a5b99b

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