Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cebcd5f7589102…

MALICIOUS

PDF

88.5 KB Created: 2020-08-06 17:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b95a6fa23fe45f48bdce481e2aa6b68e SHA-1: cfee6b71c1b15a76500985c2ac53736db455f3ba SHA-256: 07cebcd5f7589102800017e9416c12028c4166ee383e56a969c60b80563bef38
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/pify?keyword=character+development+chart+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious activity. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a potential SEO link farm tactic to obscure the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=character+development+chart+pdf
    • http://gafiluko.fineartscamp.org/uploads/1/3/2/8/132815028/3f8a1d06a52.pdf
    • http://files.humanesocietyofaurora.org/uploads/1/3/0/7/130776714/21b8d8.pdf
    • http://files.hlhas.com/uploads/1/3/1/4/131483550/wuvoxipepuzan.pdf
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/1557448806.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/larousse_english_french_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/5663567686.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/waiting_for_godot_act_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7270/files/20097880590.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/73792914780.pdf
    • https://cdn.shopify.com/s/files/1/0437/8604/3541/files/berizomutavosobem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/13461611575.pdf
    • https://cdn.shopify.com/s/files/1/0438/5406/9910/files/broadcast_programming.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/telupevonovolipake.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/tumerezamelidewidovuwinog.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000798d.bin
53f9b39d526019168a00adddc69db7960c17cda355a7cdac2ad12a1f9068d6e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x798D 6784 bytes
font_01_sfnt_off00008a98.bin
6487091c0070741e646db4a1cda49bb5dd8928231115cd9838b724a369c8679e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A98 3136 bytes
font_02_sfnt_off000095c3.bin
5f7556b0477fef9b550cc6cf6749ce6e51cad33e45435aaa6b1b312fa154e114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C3 5180 bytes
font_03_sfnt_off0000a739.bin
601d6200778ebef97dbb9561bbd5b7388b13aca6375221bff422d1c6a745b640		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA739 33992 bytes
font_04_sfnt_off00010d2c.bin
338f71787b37853a883b0f98a723c55f49523a1c2ee5818165cfa170140979eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2C 13340 bytes
font_05_sfnt_off000137e5.bin
38f5c3b2777d4bb01ea8dc6d10b7798934264e105fb2df161bd2d14060291d00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137E5 18204 bytes

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