Malicious PDF — malware analysis report

Static analysis result for SHA-256 87184f6583230592…

MALICIOUS

PDF

40.5 KB Created: 2020-08-13 23:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cf332d9ce95cc66f62420a36ae2e7df SHA-1: b572a0e47210b95ca202e6d712136f1e251b4a4a SHA-256: 87184f65832305928dc8a3bd82c2f248916e72802b5f76dd3183942cd472b0a6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector to malicious infrastructure. The primary malicious URL is https://ttraff.com/pify?keyword=scratch+2+game+project. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent to lure users to external sites.

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.com/pify?keyword=scratch+2+game+project
    • http://files.snowstorm-artstudio.com/uploads/1/3/1/4/131453250/fenasut.pdf
    • http://files.deprofundisprods.com/uploads/1/3/0/7/130775275/dovisazamef_dubakamejom.pdf
    • http://kupunas.nyabuoy.com/uploads/1/3/2/7/132740285/sikagok_nuvudadi_fopupezebed.pdf
    • http://files.wsliteracy.org/uploads/1/3/1/6/131637273/kegojifepaf.pdf
    • http://files.whollysimcha.com/uploads/1/3/0/9/130969418/jovopelanola.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/sonodepozilu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/agricultural_systems.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/puxemudeduxewijabaxisatap.pdf
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/fokoba.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/61343625449.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/zoridazirerizajikufozaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/vuvurumali.pdf
    • https://cdn.shopify.com/s/files/1/0432/5215/4532/files/9507596711.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/jazutativozijefoboponu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/charles_wright_mills_sociological_imagination.pdf
    • https://cdn.shopify.com/s/files/1/0431/7269/2122/files/gokilakikidowugo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053f0.bin
bff4e7c1207ed3a283e22d14ea5a0746e8b8e025bce3a273cbeaaa2d55b020fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F0 5080 bytes
font_01_sfnt_off00006538.bin
6e3e84cc69c7097099aa9b0fcb83e09a5349501b43950fa2669e9926a3c3fc7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6538 9968 bytes
font_02_sfnt_off0000875d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875D 4324 bytes

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