Malicious PDF — malware analysis report

Static analysis result for SHA-256 6feed8b7e51879ca…

MALICIOUS

PDF

38.5 KB Created: 2020-08-20 02:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9ed2e1014a48dc39b4302a934e87650 SHA-1: ce22e0447603902060e36b8eaf0e5d38242db126 SHA-256: 6feed8b7e51879ca0e8bc48fb8489820cf7ead91734cb6120958ab82a0e15fa4
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to ttraff.com, which is flagged as malicious. It also includes a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO spam tactic. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the phishing attempt.

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=birthday+song+for+son+in+tamil
    • http://xuvap.uptomogood.com/uploads/1/3/1/6/131636744/pilebekez-zajafabavezapa-vuwudowuxotomak-gefigolu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/ielts_actual_test_reading_listening.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/57404419046.pdf
    • https://cdn.shopify.com/s/files/1/0432/5828/2152/files/tampermonkey_youtube_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3941/files/cover_letter_for_sales_job.pdf
    • https://cdn.shopify.com/s/files/1/0433/7667/2918/files/13996248022.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/32143498848.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/vetosovapajulaposorefogi.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/fundamentals_of_computer_programming_java.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_off00004d9a.bin
28080270dbcc6cd2e115316a4e6d5d25b6311d8a223a3edf4c95ec4525d3815a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D9A 5472 bytes
font_01_sfnt_off00006015.bin
89c7100cc0885cf15537d1213ea1fc01d11c0da37bf2b7bb50160d10a409be22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6015 14104 bytes

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