Malicious PDF — malware analysis report

Static analysis result for SHA-256 146124dbffd90c02…

MALICIOUS

PDF

39.6 KB Created: 2020-08-20 09:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1713903da55ce97ea9495fbfcf343d1a SHA-1: 2e5274fa46e88efa86dfeefaf2aae9ea3cca8e45 SHA-256: 146124dbffd90c024c780c112e5f6800445ba6098ea7e90a2932aba39be818e3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of the malicious redirector URL is the primary indicator of malicious intent, likely leading to a phishing or scam page.

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=coplanar+waveguide+using+hfss
    • http://files.rosaliesilliman.com/uploads/1/3/0/9/130969090/eec70.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4831/2730/files/eagle_eye_headlights.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/oxigen_micro_atm_commission_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/dajabotida.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/15185289522.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/jegezova.pdf
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/8603685642.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/interview_questions_on_control_systems.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/validity_test.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2357/files/2954420982.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/dinafaralawire.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/wuwozo.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_off00005057.bin
4f019ea7d4c0f3534678ddb58264bbac2a8c491ebe433443c525859dad267913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5057 5280 bytes
font_01_sfnt_off00006256.bin
7332a1301b5f2d8a37be160e45d5c3465a61cf814a06a4340d6e07e4adb8a478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6256 9712 bytes
font_02_sfnt_off00008387.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8387 4324 bytes

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