Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48e1a5e97257ee6…

MALICIOUS

PDF

70.4 KB Created: 2020-09-02 09:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c841c7ce55b3eec913dc380eb2ea0f2e SHA-1: 64b9f88a1cedb719bbef65e8b8ad710487b08f86 SHA-256: f48e1a5e97257ee60b71139db975a2ff2c6e9b29ede5266b74883d185324814d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious URL is 'https://ttraff.cc/wix?keyword=famacha+anemia+guide', which is likely used to redirect users to a malicious site for phishing or malware delivery.

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/wix?keyword=famacha+anemia+guide
    • https://cdn.shopify.com/s/files/1/0448/1790/7874/files/michael_a_pastoral_poem.pdf
    • https://cdn.shopify.com/s/files/1/0435/8357/0078/files/soundhound_for_pc_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/bafakaluvapa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/32973815963.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/73938281715.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3190/files/topitira.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2864/files/administrao_financeira_stephen_ross.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/kitobizifedaselixexoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/newspaper_jumble_puzzle_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/augmented_reality_paper.pdf
    • https://cdn.shopify.com/s/files/1/0434/8782/1984/files/99082913200.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4466/files/21890791879.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d2c7e9940c74734b86249c534215d24.pdf
    • https://static.usrfiles.com/ugd/c162b3_d767ba79bf6d47e292a1333a567072d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cd0c15b13944d3c8c0a7ccd19bb429c.pdf
    • https://static.usrfiles.com/ugd/cf79db_48a3bac6cce64a09b146272c573baefa.pdf
    • https://static.usrfiles.com/ugd/8cbfce_e708f357b6a94872848f758302971c82.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c137.bin
d97691e0a2349b9415b09dda248613bd0e45867d2c7ae340ef85b47239a777ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC137 5004 bytes
font_01_sfnt_off0000d21a.bin
3027d0e07981805bc44e86c105e79a1c12c286a62fd892e35e0aff2e4eff92c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD21A 11072 bytes
font_02_sfnt_off0000f73c.bin
275d0ef8f619a30f75d5b67021c85ffe51dbf44d82a44ecb2d07128ff93f9399		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 16112 bytes

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