Malicious PDF — malware analysis report

Static analysis result for SHA-256 716ee528576b060b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-14 01:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4928781a27a1c87eee2f461a2c9c86ab SHA-1: 09c251e0ca3ff782aedf94d2ab001142ec82ae65 SHA-256: 716ee528576b060b711ca5b47570ea653d89f2e2a7a210091fe8c4ddd8040499
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same suspicious URL, indicating an attempt to lure users to click on it. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggests a phishing or scam 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.cc/pify?keyword=queen+bed+sheets+egyptian+cotton
    • http://vadazu.tucsonpastelsociety.org/uploads/1/3/1/1/131163635/welalamegiw.pdf
    • http://files.rockymtlaceguild.org/uploads/1/3/1/4/131438079/sisusaxapuzifowavofu.pdf
    • http://files.sudbrinkacademy.com/uploads/1/3/0/7/130775677/1296436.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/titemomizekititel.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/the_economist_magazine_free_download_2020_march.pdf
    • https://cdn.shopify.com/s/files/1/0441/1791/7848/files/ben_10_omniverse_2_game_iso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/executive_summary_examples_for_reports.pdf
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/10196047858.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/ditokazuwuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/47376404371.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/nubizelatasozax.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/12921189577.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/nozajelawoxadifogorexujil.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/14512127999.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/affairs_cloud_current_affairs_march_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/6903223489.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_off0000581f.bin
8d00d22de5a695aa4eb51e6899113bc739ab1961ebc87242c15c326d6c93b142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x581F 5392 bytes
font_01_sfnt_off00006a66.bin
9d5fb889adcd4ce173da5f39ab3f58053332f269dac6c2cbe47044dac499be06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 9628 bytes
font_02_sfnt_off00008b5d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5D 4324 bytes

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