Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3686cf3927b3188…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 11:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 981bc5aa22a4ae1aa650f6b8993ed01a SHA-1: 13d3f6013b062be9b58cbc14ebc166acbf123eed SHA-256: e3686cf3927b318813295db80019db29c492b3b0a7df3b161809766b10710750
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as 'customer service position interview questions and answers'. This heuristic firing, along with the ML classifier, indicates a malicious intent to redirect the user. The document body contains the visible lure text and the malicious URL.

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=customer+service+position+interview+questions+and+answers
    • http://files.calibervideo.com/uploads/1/3/1/3/131380078/543926.pdf
    • http://zijiram.atticsalt.org/uploads/1/3/1/6/131606000/8b37532cd0879.pdf
    • http://files.blueskyaircraftmarketing.com/uploads/1/3/2/6/132695408/xagikuxefowu.pdf
    • http://goberabav.mustbeheaven.com/uploads/1/3/1/3/131383434/4583544.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/coordonnes_cylindriques_et_sphriques.pdf
    • https://cdn.shopify.com/s/files/1/0430/6052/7265/files/43129235550.pdf
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/bavutefikefegiwesojul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/bipojafojadovaledaz.pdf
    • https://cdn.shopify.com/s/files/1/0449/7804/5086/files/factores_sociales_definicion_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xedatojif.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/lecture_notes_on_data_structures_and_algorithms_using_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/76045499574.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6117/files/48352049000.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_off000065e7.bin
5a1284276ae3a48cdce735ce7a3e31945b6d181693f5926ca04331eecc339284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E7 5368 bytes
font_01_sfnt_off00007824.bin
c6b77977065ca35c37acb42153af9dc9fbff4cc0580d623df9ce69aa2f68a576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7824 10008 bytes

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