Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4638cf2b37ef7e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-02 19:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79e99551f51d57ac53f2fdbb002a1826 SHA-1: 7b5ac22f6a2e448e29cb1485abc40e35302d7e71 SHA-256: 6b4638cf2b37ef7e19747c80b7af98f3c32b90f601197bab24c81bfd4c813ffc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body and heuristics indicate a lure for an advance-fee scam, likely attempting to trick users into clicking malicious links for a prize or parcel delivery. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content broadly.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.cc/pify?keyword=javascript+timer+countdown+with+seconds
    • http://files.matildameadescubittdesign.net/uploads/1/3/0/8/130874489/1bb5bf11.pdf
    • http://files.kireilifetherapy.com/uploads/1/3/0/7/130775652/7120309.pdf
    • http://files.wordfestbucharest.com/uploads/1/3/1/3/131398440/zorilos-vexisi-polifud-xemufetu.pdf
    • http://files.fpasports.com/uploads/1/3/0/7/130740323/175803.pdf
    • http://files.pabigfootcampingadventure.com/uploads/1/3/0/7/130776891/xelupegepumenix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/wanisikesexogep.pdf
    • https://cdn.shopify.com/s/files/1/0438/4810/6134/files/wonovosafojuviz.pdf
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/natexemubojixejegafefobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/nokafidomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/31636488235.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/moxafilez.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/xudiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43561311815.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/ravere.pdf
    • https://cdn.shopify.com/s/files/1/0438/5121/9104/files/geloxisepudafujoji.pdf
    • https://cdn.shopify.com/s/files/1/0439/3644/8667/files/1859502011.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/21129894656.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/kafemekipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/1605705358.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_off00006664.bin
11672062763e84e402d79e8fd926a9f7383971b0f8846c584fc2ecb64dfd7b85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6664 5424 bytes
font_01_sfnt_off000078c0.bin
7aa2f6cccdc0ef4c362b617412a33ef0954577ffc922ba29c9cc79d23a559af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C0 10628 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.