Malicious PDF — malware analysis report

Static analysis result for SHA-256 d584cf911d3f3422…

MALICIOUS

PDF

44.2 KB Created: 2020-08-20 10:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c79d59af7a4ba4ff364ddc440aa386a SHA-1: 407ba06d698b58f68f3d058c5f270155519ba952 SHA-256: d584cf911d3f3422eb32e3dfc6a9faa184293ac6728d9b82d5495c710b729838
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented to the user under the guise of 'mechanical engineering interview questions answers pdf'. The document also exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The primary malicious URL is the most critical IOC, as it serves as the initial point of compromise.

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.ru/pify?keyword=mechanical+engineering+interview+questions+answers+pdf
    • http://files.animalguardianshorserescue.org/uploads/1/3/0/7/130739970/ninenuv_gasexefar.pdf
    • http://files.alexandrakwilson.co.uk/uploads/1/3/1/1/131164174/daxuwupaje.pdf
    • http://files.mariongrp.com/uploads/1/3/0/9/130969291/lebenag.pdf
    • http://files.miraefoundation.org/uploads/1/3/2/7/132741241/cf9a883d9674.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/93397609907.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/zevoduneziwajotodivor.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/lozopolonipodudopanil.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/pajupudiwexekofepifubok.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/c1_form_for_british_passport.pdf
    • https://cdn.shopify.com/s/files/1/0438/7025/7320/files/bulidipurarajazasama.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4986/files/2650070980.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85484739365.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/bavokoka.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/scared_to_be_lonely_piano_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/7154/4225/files/prot_warrior_bis_legendary.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_off00006d8f.bin
6cd5e5ac087a71d50060f499d89704dea63c97365d2fba1efded69d2926dbe9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 5700 bytes
font_01_sfnt_off000080fb.bin
30eff931063f9bbbfe84b91349b4269c66a3d00db0aff37008aad387ea8535e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FB 10224 bytes

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