Malicious PDF — malware analysis report

Static analysis result for SHA-256 082516ab9f3b4748…

MALICIOUS

PDF

48.1 KB Created: 2020-08-20 09:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06366c00f0f344cb766623536764d9c5 SHA-1: 93c79f4d3e7c1c03d3e172091181ecb9e7e507c9 SHA-256: 082516ab9f3b4748287b61bf13c27868930657d6cedf9d4cdff0bb22b568d7a6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=ostrich+farming+manual+pdf`. The document body, though heavily obfuscated, contains a reference to this URL, suggesting a phishing or scam attempt. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm for SEO manipulation or distributing further malicious content.

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.ru/pify?keyword=ostrich+farming+manual+pdf
    • http://kimapaxup.bbt-livonia.com/uploads/1/3/2/3/132303354/18d0dca34.pdf
    • http://fezefo.roamingbrit.com/uploads/1/3/0/7/130739919/sevesusesarofuxovu.pdf
    • http://nesubo.cmcautobody.com/uploads/1/3/0/7/130775518/niluju_zamini_lexuxuropi_wonuneni.pdf
    • http://files.bentonareaedc.com/uploads/1/3/0/7/130739532/mewik-mafuvimavod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/gobikozufafejilerajakidir.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/41710057193.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9942/files/bowknot_design_platform_espadrille_wedge_sandals.pdf
    • https://cdn.shopify.com/s/files/1/0434/7514/0761/files/effects_of_greenland_ice_sheet_melting.pdf
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/86593616626.pdf
    • https://cdn.shopify.com/s/files/1/0439/2452/1128/files/8995819743.pdf
    • https://cdn.shopify.com/s/files/1/0453/9170/8328/files/eidolon_hunting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9584/files/lomiwesojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/victorious_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/68543306619.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/guild_wars_nightfall.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/destinos_an_introduction_to_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/weather_anatomia_microscopica.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_off00007a36.bin
5c7ec052acea96c1305e9e42f1cd9f2d085f52c167cfe937c99085f09e82c76a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A36 5596 bytes
font_01_sfnt_off00008d18.bin
72d802eee299022db4f3fc30c0e040c27ccfeb94becd810c16cda8d98bdbc6d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D18 10676 bytes

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