Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8de1e1c6544e87…

MALICIOUS

PDF

33.6 KB Created: 2020-08-07 19:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8a42d088f799471d556347a6b063091 SHA-1: 86feefaba67c2dda6148e623c8573214383e3b57 SHA-256: 5a8de1e1c6544e87997bccc4a293f69a551d60fe4f4f619a2baa7a76e5a21404
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, and one specifically to a known malicious redirector. The primary malicious link, 'https://ttraff.cc/pify?keyword=you+hurt+me+pdf', is designed to redirect users to further malicious content. The presence of a large number of external links suggests an attempt to distribute malware or phish for information through a deceptive link farm.

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=you+hurt+me+pdf
    • http://files.bpcrane.com/uploads/1/3/1/4/131453151/migawexuza.pdf
    • http://files.selindoalpha.com/uploads/1/3/1/3/131379567/nubewarer-lubutatalolape.pdf
    • http://files.ridgehockey.net/uploads/1/3/0/7/130776046/24544ef158e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/53598588995.pdf
    • https://cdn.shopify.com/s/files/1/0439/2887/9272/files/medical_and_surgical_asepsis.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/35677017338.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/vikuvag.pdf
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/panaxojivoboxazufozar.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/82330972397.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/25839213570.pdf
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/kosevimanurepawagojurim.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/35346139588.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/bobujizurev.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/faxovuvewobozazanege.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/spider_man_comics_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.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_off000048d2.bin
4594b13f8c8719ea4ae7f84610f797d0b31f2adca59cd54ef295ef5a115f7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48D2 4824 bytes
font_01_sfnt_off0000590d.bin
d47725aaa6909d28f458939cf747b1f93f545182ecaeceaf10ac90c908a5faea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590D 9612 bytes

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