Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed18bab33df905dd…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 20:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adf8198c2b53e8023e62f37a29375c7d SHA-1: a113b46b812a8a9617e80d82129f0eab2abc9907 SHA-256: ed18bab33df905dd631b226ae24309cc6e4ab1fcf716138f19e0d47b5373b2f0
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Coriolis flow meter pdf' and references the wkhtmltopdf tool, suggesting a lure to disguise malicious content. The presence of a link farm and a critical PDF redirector heuristic strongly indicates a phishing or redirection attempt.

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.com/pify?keyword=coriolis+flow+meter+pdf
    • http://vavurubut.dagninoiv.org/uploads/1/3/0/8/130813330/1835448.pdf
    • http://gokebul.stpetersontherock.ca/uploads/1/3/1/1/131164250/nulipubunafi.pdf
    • http://kotukar.annapolisheirlooms.com/uploads/1/3/1/0/131071157/1030952.pdf
    • http://files.tonysconstructioninc.com/uploads/1/3/1/1/131163949/3644869.pdf
    • http://files.slightlyaskewphotography.com/uploads/1/3/2/3/132303378/pitudofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/mhw_threat_level.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/kuvutari.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/kigegadejixojudodegam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/candombl_nao_angola.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/nys_notary_exam_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/blur_dnd_5e.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/super_mario_64_wad_ntsc.pdf
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/grammar_worksheets_for_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/reverse_linked_list_leetcode.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/40776526816.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_off00005e06.bin
d7bb71f0115fbdb578544ebaaca41832ad9428bd5a09d232ba74e4043e6363b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E06 4972 bytes
font_01_sfnt_off00006ee8.bin
15f3af1ccea1a24074b6d2e78d4ebc940a6ec1c756e3b13625ea8e53fd0f10f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE8 11044 bytes

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