Malicious PDF — malware analysis report

Static analysis result for SHA-256 0daba28e6fd144c8…

MALICIOUS

PDF

43.6 KB Created: 2020-08-01 05:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebec57cb193dd390b9caed5a92b488f3 SHA-1: 528d1557756f90f8d5088d6ff0bd9de107292c74 SHA-256: 0daba28e6fd144c8ce4946a9518b5e01a5ffdc9be985f53b7d4c95bea4ff0ad8
174 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on various domains. One of these links, 'https://ttraff.ru/pify?keyword=canon+rock+tab', is identified as a malicious redirector. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam context, further supported by the presence of numerous links designed to lead the user astray. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=canon+rock+tab
    • http://files.uwleakdetector.com/uploads/1/3/1/4/131453823/330259.pdf
    • http://files.sobabaseball.net/uploads/1/3/1/3/131398334/2978252.pdf
    • http://files.athanasios.co/uploads/1/3/1/4/131454850/715f8d4c.pdf
    • http://files.moraelemart.org/uploads/1/3/1/4/131406544/pitosagofibas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/tejevavurezupad.pdf
    • https://cdn.shopify.com/s/files/1/0429/7401/9740/files/88349562832.pdf
    • https://cdn.shopify.com/s/files/1/0429/2457/2835/files/razamepupugukojirasapibef.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/42163701133.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/13742092621.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8889/files/55358156662.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/19435142549.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3791/files/53956064869.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/73313010461.pdf
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/tobiziw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/77079364251.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/86426650303.pdf
    • https://cdn.shopify.com/s/files/1/0435/8022/7747/files/86675764294.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/67346584844.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_off00006db6.bin
f4b3a1f843a6d3f1da6a71eb568c1338663091c00c56f9a774f5c10d02e81d15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB6 4692 bytes
font_01_sfnt_off00007db8.bin
06ea94e7863727020d7a58cf2fb8618e693886be61526d8105e03bdd5975110c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB8 10380 bytes

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