Malicious PDF — malware analysis report

Static analysis result for SHA-256 141ef6b2c8438dab…

MALICIOUS

PDF

58.8 KB Created: 2020-08-03 12:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34dbae7f3a45da1ee12859fa7da2577a SHA-1: 1ed84cf84ab68ce52eb9b34b78e57a67421cdc58 SHA-256: 141ef6b2c8438dab3f1e4215769b99ae56b99b1ac2fadb05e3c448436438a558
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm with numerous external links, many pointing to Shopify-hosted PDFs. The embedded URL in the document body, 'https://ttraff.com/wb?keyword=the%20unbecoming%20of%20mara%20dyer%20pdf%20vk', is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

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.com/wb?keyword=the%20unbecoming%20of%20mara%20dyer%20pdf%20vk
    • http://files.phoebesmithceramics.com/uploads/1/3/0/7/130776852/5924525.pdf
    • http://files.nealybirthandlactation.com/uploads/1/3/1/4/131453124/dc7b05.pdf
    • http://files.walnutgroveauction.com/uploads/1/3/1/3/131384121/79e2fd.pdf
    • http://files.smlworld.co.uk/uploads/1/3/1/3/131383586/42ef8.pdf
    • http://files.ruthbunnewell.com/uploads/1/3/2/6/132682892/bameboxefugoxi_litemum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/9567/7346/files/arduino_piezo_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/8031/8118/files/2532753614.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xoperesotojazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/79366814390.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/inheritance_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0439/0033/8331/files/zelosewekakuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/ignou_assignment_first_page.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/23882761827.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/pepalenujinurokumuxijej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2187/6899/files/yahoo_messenger_downloads_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0434/6714/5366/files/22242195691.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/65002330337.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/biwuk.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007244.bin
58961c70b013b6a0b6cc7a72be0ee2f318dac345dbe0bf92345851aa90b86660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7244 5476 bytes
font_01_sfnt_off000084ab.bin
00cfcffa6ada9beb2124557393c7d706aaed4795eea35d9067aa433471c86b14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 5700 bytes
font_02_sfnt_off0000943a.bin
5bbfaff866ecd8d05d654b45145b6b640471b05fd68e1841f8b1996f27363907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x943A 10464 bytes
font_03_sfnt_off0000b848.bin
a9a316927e0db9c32c4827c833112c326f78c8da1b6c4d8afc246cdcea13b662		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB848 16596 bytes
font_04_sfnt_off0000ce7f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7F 4324 bytes

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