Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4888a05acb0f7b2…

MALICIOUS

PDF

74.1 KB Created: 2020-08-26 19:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad25995be9471d4a3c3d702553212e25 SHA-1: 6e6039e79a787a9c6c504d02053f215beb5303a5 SHA-256: e4888a05acb0f7b2f30affd77a178c2a3ade5fc7f0518261770ec8db39f96081
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=jurassic+park+gameboy+advance'. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=jurassic+park+gameboy+advance
    • http://gopudil.kaufmancountylawyer.com/uploads/1/3/0/8/130814297/noboj_komoseriz_lokusudebagej.pdf
    • http://loxew.mindseyevintage.com/uploads/1/3/0/7/130775626/vexeruk_bixij.pdf
    • http://burun.abcchildbirthservices.com/uploads/1/3/0/8/130873998/ponokowo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0740/8290/files/fallen_sarah_mclachlan_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/41934082757.pdf
    • https://cdn.shopify.com/s/files/1/0435/4677/1607/files/vutesusofig.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/39700708279.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/best_formation_for_bundesliga_team_fifa_20.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/genuine_bitcoin_investment_platform.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/54781419326.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8903/files/23690986381.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/parasitologia_humana_neves_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/3156/7256/files/83349885373.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e296.bin
478ba99232922b25c6af4fdb8fa9f5f851b71348b6c1b0d8cc8a143b9d943481		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 5716 bytes
font_01_sfnt_off0000f5fd.bin
26b5abd91b13e4a37f7ba2e3c159bbd69f31cb32205fc073955ff0d7470695c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FD 11628 bytes

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