Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9ee06d2ec299c1…

MALICIOUS

PDF

60.1 KB Created: 2020-08-04 02:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e96fbbd9e38360c169bc063bc333e9c5 SHA-1: f114408b12f61661fef725b828aff59f5f8ab1ad SHA-256: 3d9ee06d2ec299c134128c4a479a22936d308965cafcff9e64ea92223bb1df1f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=peltier+effect+pdf'. This URL is designed to lure users into clicking through to potentially malicious content. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its role as a lure. The ML classifier also strongly indicated maliciousness.

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=peltier+effect+pdf
    • http://files.rescuedada.net/uploads/1/3/1/3/131380005/xoxapuvuram-zuvunegivuj-divageragewi.pdf
    • http://files.wretchedmom.com/uploads/1/3/0/7/130739288/putatuxevovene.pdf
    • http://files.kauaifoodofthegods.com/uploads/1/3/1/3/131381946/wogojujedoz.pdf
    • http://files.creativeprintables.org/uploads/1/3/1/3/131379296/febafowazivefovum.pdf
    • http://files.greatscottideas.com/uploads/1/3/0/7/130776499/gigifugazuzaw_sibenozubegefa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8854/2872/files/pofijumam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/zoxavodopetoxevisupebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/suwamefod.pdf
    • https://cdn.shopify.com/s/files/1/0434/9096/7714/files/xilikisaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3907/1144/files/do_while_js.pdf
    • https://cdn.shopify.com/s/files/1/0431/8845/3533/files/43858246735.pdf
    • https://cdn.shopify.com/s/files/1/0427/7790/3263/files/mepagubujifofukerosisudu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6209/files/jaxuzex.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/57634319252.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/vafurizupoxurugeritew.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/amumu_jungle_runes.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000098fd.bin
b814128ee2ee6e363135cb3d555b83a1cdbc83ba3caec652a96e929dc07cc962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FD 4764 bytes
font_01_sfnt_off0000a945.bin
c2caff8353055fd3a9de429d3ac24bbf231e7a2adf4850059fd4128c44df1fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA945 10872 bytes
font_02_sfnt_off0000ce25.bin
a6084831d910e190a3d08f96e5f78455ba45c8295a05a389334638e59bed44cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE25 16108 bytes

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