Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c079837d88da21…

MALICIOUS

PDF

68.1 KB Created: 2020-08-07 20:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e678e1548b8a85f66e262355277dc4b2 SHA-1: abd88b3818dd0063791b27d487c596c44f56ef0c SHA-256: f1c079837d88da213693ff07ab2595cd48ca865f28fcc239e0f184ca54cbe0c8
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=energia+eolica+chile+pdf'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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=energia+eolica+chile+pdf
    • http://files.mfsasr.com/uploads/1/3/0/7/130776481/nujilutisuxuwov-temex.pdf
    • http://files.unityofheartfalmouth.com/uploads/1/3/0/7/130775515/rorifovoxotu-jigezolisogizol.pdf
    • http://files.greentarafarm.com/uploads/1/3/1/6/131606434/nazezumitesabegule.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/noxolenopazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/likelu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/posasutotetexisolemob.pdf
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/node._js_discord_bot.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/adobe_acrobat_pro_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/ford_600_tractor_parts.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9283/files/93215865915.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/35430336452.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/76607653601.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/woxisatusuwukefalifoko.pdf
    • https://cdn.shopify.com/s/files/1/0435/6915/2159/files/pikamomivakabowasen.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_off0000b494.bin
29fc9453603eda2d7bd206abd8d10877761300abdf685986cd0ef15bffdddc9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB494 5196 bytes
font_01_sfnt_off0000c633.bin
7a02da73c5ff24218d04b188db7d31ceb9303d5dedd43b645f18a615a19d9b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC633 6068 bytes
font_02_sfnt_off0000d5e4.bin
739ec7adf26383ce6241d33ef258844e43fa60478659449e4065d6cd85c0c779		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E4 14844 bytes

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