Malicious PDF — malware analysis report

Static analysis result for SHA-256 761668c4be4747f6…

MALICIOUS

PDF

53.8 KB Created: 2020-08-31 02:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d7868aafe8b6bc2deeaf8f9b127f6de SHA-1: 7ec838a7a9a3779af259072df610ee04bbe78b4e SHA-256: 761668c4be4747f6297d48b7bfb6f5c0339e02dcf983de20c993791a3f8b15cc
174 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'ttraff.cc', which is likely used to funnel victims to further malicious content. The document body and embedded links suggest a lure related to 'Oblivion best items', aiming to trick users into clicking the malicious URL. The presence of numerous PDF links, many pointing to benign Shopify URLs, indicates a link farm technique to potentially improve SEO for malicious content or to obscure the primary malicious link.

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.cc/wix?keyword=oblivion+best+items
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/45537176060.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1735/files/25082156052.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/82855956540.pdf
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/voxadonuketitadev.pdf
    • https://static.usrfiles.com/ugd/df4650_40145a60e1754ec4af13d1d7d1b5a430.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b35804b4e1b42b0b027bcbe58865553.pdf
    • https://static.usrfiles.com/ugd/79e0dc_f24227d4726d4813952ec6ff1ad75366.pdf
    • https://static.usrfiles.com/ugd/b58d21_3ae754e8223244688b04f5e706616143.pdf
    • https://static.usrfiles.com/ugd/b8c837_565e142e74bb4bff947d7d6f5e03d185.pdf
    • https://static.usrfiles.com/ugd/5de1df_3994ab8a31cf49ec914e6cb6ef755df0.pdf
    • https://static.usrfiles.com/ugd/b8c837_597443141cdd4dd08befe21a0b7ad014.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/the_apprentice_2017_cast.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/bncc_lngua_inglesa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/51072704844.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3141/files/fusezobitotoluxujukaxo.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_off00009694.bin
1a25ce7f80f4105a7a2e5155efe28aeb50bf886dbf882b3de3e4dbd0d0ba92f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9694 4752 bytes
font_01_sfnt_off0000a6b0.bin
98dfcf79ca74a6802e9b23188cd95b7e29ae3066348539a707f05833b878f1fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B0 10560 bytes

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