Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5941a857c69340a…

MALICIOUS

PDF

49.9 KB Created: 2020-08-30 14:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17ffd18cbb52df6555f2ca2bf488359a SHA-1: 787e7356df69024ffb09d8be6bb4e9a4c23af8fd SHA-256: f5941a857c69340a064dcc879160c5968ddd10bf245472c2b630062cdc1a31cd
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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains a URL similar to the redirector, suggesting a lure to external content. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=download+jhene+aiko+stay+ready
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/2383588467.pdf
    • https://cdn.shopify.com/s/files/1/0459/0062/8122/files/wuwebipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6354/8831/files/34012650342.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/the_image_of_africa_in_heart_of_darkness.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/zilexatijibogulodadofujox.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6599/files/calculus_early_transcendentals_8th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/kivegujeniw.pdf
    • https://cdn.shopify.com/s/files/1/0438/4125/7629/files/2012_dodge_grand_caravan_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/24705109119.pdf
    • https://cdn.shopify.com/s/files/1/0438/4869/5958/files/neufert_download.pdf
    • https://cdn.shopify.com/s/files/1/0463/4791/1329/files/ballerina_film_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/partnership_account_format_o_level.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b76.bin
84c0782bfce39ce631230603449e605ab9e6b53690ca707cf00b30ee09bf3c63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B76 7808 bytes
font_01_sfnt_off00006646.bin
7c3c63c2ddfd82f25f82e1c4311c8d2fa417e7bbbf46eb289793edbfc3bb0110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6646 5248 bytes
font_02_sfnt_off00007830.bin
7c713ddc8fc67f66f3b23d3def9abcba6f1fc8446afc8a13c95a4cd1dee3ff6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7830 10152 bytes
font_03_sfnt_off00009b0d.bin
001d00114279cda904ec87ee5caf81ece5266ef333c342f0ca5ce216f4908131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B0D 18776 bytes

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