Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc35541bf87c6da…

MALICIOUS

PDF

41.3 KB Created: 2020-08-01 13:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b950e44f7f64079cb07e94456d927195 SHA-1: 39df55ff82c2e9ca1cb86be564d4f6081d718537 SHA-256: dcc35541bf87c6dab6241c449785c128bab738d3b6d43c19e7bbed3673063b8c
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous external links. One of these links, 'https://ttraff.cc/pify?keyword=arcane+dimensions+quake', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL and the link farm structure strongly suggest a malicious intent, likely to lure users to malicious sites.

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=arcane+dimensions+quake
    • http://files.teamdoughty.com/uploads/1/3/1/0/131070051/fekuposurev-kusiwolit-tuxape.pdf
    • http://files.lydiaannflymasters.com/uploads/1/3/2/7/132712676/pizakeronapoga.pdf
    • http://files.navamon.ch/uploads/1/3/1/3/131398547/1106762.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/31869810553.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3639/files/vawuvafom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7335/files/30474059767.pdf
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/nukibes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/tuxogarijatem.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/mapisofuxisedekilisazil.pdf
    • https://cdn.shopify.com/s/files/1/0440/7151/8373/files/31875173993.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/58057949138.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/tatewerurora.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_off0000642a.bin
25e1bb5dca9f7d9397f5d77764923e411ea9d431e6489d2eb547dba088edd506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642A 5232 bytes
font_01_sfnt_off000075e1.bin
d1b74857417544a6c70b69eb3bff9ae0a8b1ad66d450920d6d86457db7962ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E1 10412 bytes

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