Malicious PDF — malware analysis report

Static analysis result for SHA-256 703d73b9b0702c48…

MALICIOUS

PDF

44.8 KB Created: 2020-08-19 10:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36aff2d44d1770d82630d577c7643d9c SHA-1: aff8e4be18433c5ab4bb095702cdfcab62bc9bb3 SHA-256: 703d73b9b0702c48ddaaeb7f50ae090139311533bf82834f008ce0d2440738bc
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that is likely intended to lure the user to a malicious site. The presence of numerous external links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=certificate+of+analysis+sample+pdf
    • http://files.tomhumeartist.com/uploads/1/3/1/4/131453241/mujunatizovixikuxe.pdf
    • http://files.bleuprinthairstudio.com/uploads/1/3/2/6/132680986/vomimabizosaxaz.pdf
    • http://files.shopboutik.com/uploads/1/3/1/4/131453733/65250f322.pdf
    • http://files.festoonlettering.com/uploads/1/3/0/8/130874109/zalamewi-potagikakida-pokelijata-dijawepafi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0483/6515/files/action_plan_to_achieve_sales_target.pdf
    • https://cdn.shopify.com/s/files/1/0436/9258/9210/files/stayin_alive_bass_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/zetutoganemire.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7374/files/9381934161.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/zinakanini.pdf
    • https://cdn.shopify.com/s/files/1/0428/5536/6822/files/photonics_optical_electronics_in_modern_communications.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/44521571023.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/dujanivujapub.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/61248796293.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6445/files/advantages_and_disadvantages_of_using_social_networks_in_business.pdf
    • https://cdn.shopify.com/s/files/1/0435/3107/5743/files/ashab_e_kahf_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/83869292616.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/223980185.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_off000071da.bin
76a2efcedde93d534c8283deafc371c29e33b2a39752bed3efe7f6870746e55e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DA 5308 bytes
font_01_sfnt_off000083d1.bin
f7f7488c5ddcba847fe59926a52e5f02df9e31542561ac6bfdae14fa5505a5b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D1 10132 bytes

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