Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e950aae2feeddba…

MALICIOUS

PDF

37.7 KB Created: 2020-08-10 21:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 756113519ba19ccbaa84c2541e02172c SHA-1: 633cee9f1178ccea55ae22fe585035ed51b83afa SHA-256: 3e950aae2feeddba3fbcad1da9929079b0f343b650f9edb8807ed188279742c4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com). The document body, though heavily obfuscated, contains the URL that triggered the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This suggests the primary goal is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links were generated, likely to improve search engine ranking for malicious content.

Heuristics 3

  • 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.
  • 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/pify?keyword=algorithms+for+optimization+mykel+j.+kochenderfer+pdf
    • http://files.futureearth.eu/uploads/1/3/1/3/131398145/591b30e1.pdf
    • http://mones.p5pythons.com/uploads/1/3/1/4/131453574/tujuvi.pdf
    • http://jazanok.hometownplanning.com/uploads/1/3/1/1/131164250/6d88a51ca5e674.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/fabeguk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/midapatidiniwowuperolenod.pdf
    • https://cdn.shopify.com/s/files/1/0438/9447/2856/files/padukukiwavudude.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/57331109972.pdf
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/rmv-_1_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/catalogue_marjane_octobre_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/28716433509.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7121/files/indirimbo_zo_guhimbaza_imana.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/lepinewuvokeradipijep.pdf
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/sokikovinonukevejazo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005445.bin
b1ebc2bc020fd40200dd0bb3b7ab25a14dfb21e16cfbe16af6f908768d023f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5445 5884 bytes
font_01_sfnt_off0000683c.bin
037a8566562be410d1ce056598649a1ac1d277e9f520f6a9ea696a036e9174b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683C 9880 bytes

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