Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f31c2bfcbf41b13…

MALICIOUS

PDF

65.5 KB Created: 2020-08-21 00:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94e5091dd1cddea205935d5821484608 SHA-1: 1f7c5f0506c82712c5002b97b281af19537b29d2 SHA-256: 4f31c2bfcbf41b136ec8ec7505d57d2979b9db66b61e7fc08f06eeff2991cfa8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Rcog guidelines hypertensive disorders in pregnancy'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or redirection strategy. The primary malicious URL identified is https://ttraff.com/pify?keyword=rcog+guidelines+hypertensive+disorders+in+pregnancy.

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=rcog+guidelines+hypertensive+disorders+in+pregnancy
    • http://jajurevij.extravagantadvent.com/uploads/1/3/1/4/131438888/vigaj.pdf
    • http://taxev.yourhomeonthehill.com/uploads/1/3/2/6/132681947/libugelisikeli.pdf
    • http://muvawage.hcm-electrical.co.uk/uploads/1/3/1/4/131438161/pemavabelonadej.pdf
    • http://pimuwi.x-btc.com/uploads/1/3/1/6/131607062/nebepetababu_bemojokipasegi_gukigarivelabik_nakelojar.pdf
    • http://luronude.grillinmagic.org/uploads/1/3/1/3/131380397/lasiwidozoporov.pdf
    • https://cdn.shopify.com/s/files/1/0430/9978/3319/files/85564304312.pdf
    • https://cdn.shopify.com/s/files/1/0458/6297/7689/files/escape_room_game_level_116_answer.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/govifisorevuxifefasirudiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/general_cable_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/repitilififil.pdf
    • https://cdn.shopify.com/s/files/1/0428/4838/7239/files/51180280096.pdf
    • https://cdn.shopify.com/s/files/1/0437/2054/0310/files/morofizesopaveleremimusid.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/sateriparidotumafaze.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/99671151609.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7791/files/35793103793.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_off0000c1dd.bin
fe8a0c520c3980533b3620dae59a1a451784c71b513f6e8b91884078823927d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DD 5504 bytes
font_01_sfnt_off0000d498.bin
f9e31e27cea87ada864960e087649b7115f295b9c52807be8d1d7c244b5ea29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD498 10532 bytes

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