Malicious PDF — malware analysis report

Static analysis result for SHA-256 87993212ff837e8c…

MALICIOUS

PDF

48.4 KB Created: 2020-08-30 08:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50cd73edaee5806222f54259e7f26f30 SHA-1: 00c1466a238fc2492aff572763b99141cc5f036b SHA-256: 87993212ff837e8c5b4c310e9399c9b148e5aa3de8eed63459c52fe87bb81138
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a mass of external links, including one pointing to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=delitos+y+amenazas+del+comercio+elec'. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be intended to trick users into downloading an archive, possibly containing a payload, by providing password instructions. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/wix?keyword=delitos+y+amenazas+del+comercio+elec
    • http://www.ilhn.com/datos/saber/imagenes/hackers.gif
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/57464943649.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/71968255315.pdf
    • https://cdn.shopify.com/s/files/1/0461/4543/7859/files/spark_the_definitive_guide_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/naruto_shippuden_storm_4_ppsspp_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4264/3868/files/47939411083.pdf
    • https://static.usrfiles.com/ugd/ace02d_dd778096b0324677a37d953f90a8985d.pdf
    • https://static.usrfiles.com/ugd/1849a1_b68169172eda444abcb0b65157931a2d.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/98245471487.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/xetejufifusixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2109/files/dfbguide_food_and_wine_festival.pdf
    • https://cdn.shopify.com/s/files/1/0462/4574/0695/files/40779700914.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dbf.bin
60999cd044a5bf9639cf59abd676e8a770aa03f95cb96d7847c75eeb4308ed8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 5236 bytes
font_01_sfnt_off00008f84.bin
6763ecc383aa65a3bb2276eee993730aa5503ccdc749a7b71934ac229901b467
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F84 11548 bytes