Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aba58cc09e6fe91…

MALICIOUS

PDF

46.0 KB Created: 2020-09-09 03:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a69a19ee402215df8493a47d6fa8e8a SHA-1: d369d10e62b02572c2c7fa06534d10078db8acb0 SHA-256: 6aba58cc09e6fe917bee388deca2df04366887d364b33f989ced4ed776f67869
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a known malicious redirector, disguised as a free Excel template. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to the lure content, suggesting an attempt to trick users into clicking the link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/wix?keyword=responsibility+matrix+excel+template+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/0a84ca_d5fd8ef38c2d478794ad91d8a95b51fd.pdf
    • https://static.usrfiles.com/ugd/87fdc7_3925282bc93e47169cfd0f78babf91ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_7155f7c6b781428d89e675d6822e7004.pdf
    • https://static.usrfiles.com/ugd/73cb9e_5639d04e227c4ae58b2bd1fe5d780a8d.pdf
    • https://static.usrfiles.com/ugd/de02f3_4d951707dee34b7c9d0f9877571f68af.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bd8c060f0054c4aaf48efed9692b423.pdf
    • https://static.usrfiles.com/ugd/108936_9a093be3580d4a028855322343190a12.pdf
    • https://static.usrfiles.com/ugd/031dda_2ff491deff2f4b65832fa9075c9abc7f.pdf
    • https://static.usrfiles.com/ugd/739437_8bfa1a7f8bda4732bd044ddec900a4db.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_651dfdf2a60544feab60520a2f0298ce.pdf
    • https://static.usrfiles.com/ugd/c0b427_bcc7964400cc4b3cbcb3907623f2d2ea.pdf
    • https://static.usrfiles.com/ugd/6116da_68760fc28d2b455ba18c2b595489b974.pdf
    • https://cdn.shopify.com/s/files/1/0437/7817/9221/files/soravudupekakode.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/vidodijikawolat.pdf
    • https://cdn.shopify.com/s/files/1/0441/1781/9544/files/shin_chan_tamil_video_hd.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9361/files/1_lunatic_1_ice_pick_voll_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/9608/8481/files/coliformes_totales_definicion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691a.bin
473b53cd626a81b8cacd181f049b4a30af59a90515f20168512cffcedc256299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691A 5264 bytes
font_01_sfnt_off00007ae3.bin
6825b5d83afe778e8505956bd8180e4f3f54ad39613b81d8cd64724edff969fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE3 9968 bytes
font_02_sfnt_off00009cea.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEA 4324 bytes

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