Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdc3f63cba53254…

MALICIOUS

PDF

60.8 KB Created: 2020-09-29 19:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 46bbe32ddf0cde2f3c4c6203244ea32a SHA-1: b7606fe5e0a2ed7674020fbca05d0d1886744fef SHA-256: 5bdc3f63cba53254b1800e349fbe7122002b9aaacba7f7874141f5f46ccc68b5
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 directing users to 'gettraff.ru'. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence further support the malicious nature of this document, likely intended to redirect users to malicious sites.

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://gettraff.ru/strik?keyword=vertical+farming+thesis+pdf In PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/95283735071.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/vezotadiwilukodexon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4667/4337/files/netozuwuxezili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26384136461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2785/files/fesafuxovebagedil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/chal_ve_tu_bandeya_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/broken_shore_world_quest_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2cfd438-b21b-4501-bf77-8e3857cfc77f/85653343800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9ab916-2d20-40bd-8437-be9db321c245/jizijalipisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/5.1_models_of_the_atom_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/jejul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2752/8871/files/cnet_best_android_phones_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/wawufumumaxet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA195 5212 bytes
SHA-256: b0c034301547f47c3057628089aeac0ea6b439bbd1701ac04796e0072a80bde6
font_01_sfnt_off0000b31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB31A 10716 bytes
SHA-256: 570f2c946857f09891f7f5640058f10c940b07943d3b3f29a0078c12844ebe26
font_02_sfnt_off0000d7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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