Malicious PDF — malware analysis report

Static analysis result for SHA-256 e866b7ca8a9f01da…

MALICIOUS

PDF

44.1 KB Created: 2020-08-14 16:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1b07f41c84a15195587cec9f5351c10 SHA-1: 3c8462f7ac4f731cd7234fae60d52ad148fd4930 SHA-256: e866b7ca8a9f01da2c874c3ddeef11031e0cd45d6d9ec9ee324d74fff221031d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high density of external links, many pointing to Shopify domains hosting other PDFs, suggesting an SEO link farm or a method to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=roblox+shirt+template+transparent+png'. The document body, though heavily obfuscated, contains this same URL, indicating the primary intent is to redirect the user to potentially harmful content. No scripts were extracted from this sample.

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.ru/pify?keyword=roblox+shirt+template+transparent+png
    • http://liled.thejoyoftango.com/uploads/1/3/1/6/131637376/2396775.pdf
    • http://zututadu.afterhoursbandearth.com/uploads/1/3/0/8/130874655/lazoto.pdf
    • http://kumigimin.luvlifeaz.com/uploads/1/3/1/3/131398020/pelet-tipavodupab-tebobamuzi.pdf
    • http://files.playtennismarin.com/uploads/1/3/2/8/132814996/ledexasixiramarafuka.pdf
    • http://luxuken.hopfenprarie.com/uploads/1/3/1/4/131407181/kuzojo-xomov-pazoxedizebit-soxomufubodap.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/jesimuzubuseki.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/jerened.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/85877729573.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/38099284005.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/el_dinosaurio_augusto_monterroso_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/pilolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/tokapagoni.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/sample_application_letter_for_teaching_position_in_college.pdf
    • https://cdn.shopify.com/s/files/1/0430/9696/5269/files/35978176902.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/enter_the_gungeon_lament_configurum.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/importance_of_play_based_learning_in_early_childhood.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/wapotenoxobipogaj.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/
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/wapoteno

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050cb.bin
208b632d6c54c193c889d9579d02063dd9816539569d9b03ce282fbb0241a0e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50CB 5448 bytes
font_01_sfnt_off00006325.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 1800 bytes
font_02_sfnt_off00006bb2.bin
283d83a99b67b80e6a5449554fb1869b01e2e6f6d915cc1d1b30664f5d40e339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB2 9468 bytes
font_03_sfnt_off00008c4a.bin
451a97a76e1cd188b335db18aa59b090969584b10ed985ec5dcca0b5cdb1d7ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4A 16660 bytes

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