Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2a85ae7966c6c3…

MALICIOUS

PDF

47.3 KB Created: 2020-08-11 07:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c03322a67fd11f6ef2b8c97fe9d2b4dd SHA-1: 58081bdb8397becb42bbaf2826f7a4d88901db4a SHA-256: 8e2a85ae7966c6c38f3d3a1172aa413c2365126f554c0331de21634cb45f8eb5
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=gios+pdf+splitter+merger+portable'. This suggests the document is designed to redirect users to potentially harmful content, possibly for SEO manipulation or phishing purposes. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=gios+pdf+splitter+merger+portable
    • http://files.jethuntclub.com/uploads/1/3/0/8/130874671/03f35d2.pdf
    • http://files.yodha.net/uploads/1/3/0/9/130968996/7689640.pdf
    • http://files.unboundtravelers.org/uploads/1/3/0/8/130873908/bb6f1a.pdf
    • http://files.lindberghforte.org/uploads/1/3/1/3/131383325/tuvepunukeg_wuzubukuz.pdf
    • http://files.haydenflooringservices.co.uk/uploads/1/3/1/4/131454466/gegan.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/mime_types_for.pdf
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/xezewebibevaxukomavizaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8857/5638/files/56737909097.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/25349273328.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/44683970276.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/50822279842.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/23540526019.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/50709578435.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/wazitinamedegoduluzeka.pdf
    • https://cdn.shopify.com/s/files/1/0445/8224/0420/files/angela_carter_bluebeard.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/10632347984.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/cognitive_dissonance_podcast.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/21884057929.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/25612366354.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_off00006d90.bin
6b9ad4c576afbc83b05756b7e6781643f1e70a164517ad9de80fe2a4055d8a75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D90 5532 bytes
font_01_sfnt_off0000804a.bin
e2b7b9526f1097a039c61c5649fc5dce9fd0afd95beb2127369ad03023aff173
pdf-font-stream PDF embedded font (sfnt) at offset 0x804A 15168 bytes