Malicious PDF — malware analysis report

Static analysis result for SHA-256 1209f33195684608…

MALICIOUS

PDF

172.5 KB Created: 2020-08-16 17:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd6c3eb88e2d8ef9a0c8fe7b2f4f4827 SHA-1: 26c517afc380a8441f9dbdd35073a8dfcc1379fe SHA-256: 1209f33195684608d7ab5b2975b92a8b85a49ea8f788e3f1157e4f22ea6f9ed9
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host or distribute further malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URL heuristic suggest an attempt to lure the user to a malicious site, potentially for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.ru/pify?keyword=arturia+drumbrute+manual+pdf
    • http://files.mydarksites.com/uploads/1/3/1/6/131636725/358d6d.pdf
    • http://wigaviwu.prideypets.com/uploads/1/3/0/7/130775162/74cbabe4a9ed3.pdf
    • http://files.hisandhersboutique.net/uploads/1/3/1/6/131637055/7157786.pdf
    • http://semuwan.capitalaccesshk.com/uploads/1/3/1/0/131070450/geloxigo.pdf
    • http://files.jpicac.org/uploads/1/3/1/4/131408432/wolororo_lugerakip_xitijigad_nemon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/wubiripenux.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/58705145549.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/1332289876.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/70944341260.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/fatebogixowazedexelipexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5145/0519/files/the_boyfriend_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/3816/9498/files/converter_file_to_word_document.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/65581672325.pdf
    • https://cdn.shopify.com/s/files/1/0447/2917/2122/files/anglais_francais.pdf
    • https://cdn.shopify.com/s/files/1/0434/0052/8033/files/bufajaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/36370869703.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026ed2.bin
d3a2f4b87090a7125f2a1b33d86faca84ecbc9dd0d2721f7b7cdfcfd427e4b74
pdf-font-stream PDF embedded font (sfnt) at offset 0x26ED2 5140 bytes
font_01_sfnt_off0002802f.bin
0c7dfed81563cf274829eca1449187fb7510626b400d994b29c8a65d48714190
pdf-font-stream PDF embedded font (sfnt) at offset 0x2802F 10408 bytes