Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0b3fe5a86d1590…

MALICIOUS

PDF

46.9 KB Created: 2020-08-20 18:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5028c65cb61da70dd2ca91247774c88d SHA-1: 3f398cfcfe5d5cc640352e875c8ca215be412b0b SHA-256: 6b0b3fe5a86d1590bebe1fd8f0f218bcc172fdf7d2393e1281f82b17548e1d3b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that is part of a link farm, likely intended to manipulate search engine results or distribute malware. The presence of numerous external links, many pointing to benign Shopify URLs, suggests a SEO poisoning or link farm tactic. The primary malicious URL is `https://ttraff.cc/pify?keyword=hidden+video+recorder+apk+pro`, which is designed to trick users into downloading potentially harmful software.

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.cc/pify?keyword=hidden+video+recorder+apk+pro
    • http://files.ausablevalleygrangefarmersmarkets.com/uploads/1/3/0/8/130873715/a6d496.pdf
    • http://vajibami.glendorasleep.com/uploads/1/3/1/8/131857054/mesoxekege-rafurepuwaba-fenexifezujam-vowun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/principles_of_geotechnical_engineering_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/biosensors_for_medical_applications_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/tcs_verbal_ability_questions_with_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/metevudaxomatabexovejezof.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/lonowizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/63332999260.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/zorezugaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/69014942618.pdf
    • https://cdn.shopify.com/s/files/1/0440/8174/1976/files/47905623109.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8333/files/mobivexojobikufujob.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/game_of_thrones_livros.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/chamorro_english_dictionary.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006368.bin
c321d7e15f5d47478639e589a37227f0dae76eb226483600fd9526edc2020320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 4940 bytes
font_01_sfnt_off0000743d.bin
08faca796f098af211773c6548062d376a8e9b5d4cea71e35b1ca14b15a33386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743D 10196 bytes
font_02_sfnt_off0000974d.bin
e3b8b1142c05457c9f93cc19be5eb7b1984c558453394b316902b8383988d209		 pdf-font-stream PDF embedded font (sfnt) at offset 0x974D 16852 bytes

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