Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8835088b753ad7…

MALICIOUS

PDF

39.1 KB Created: 2020-08-30 18:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a684722030c946133fc7d0ae73631576 SHA-1: 9573343895e88f997af4cdb2cb72732d8ea97326 SHA-256: ae8835088b753ad774deb4fced5f0748ecba2023d263557e8186e30ff42514da
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though obfuscated, contains text related to 'strategic analysis pdf' and the 'wkhtmltopdf' tool, suggesting a lure. The primary malicious IOC is the ttraff.com URL, which is likely used to redirect users to further malicious content.

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/wix?keyword=strategic+analysis+pdf
    • https://static.usrfiles.com/ugd/bae363_2018e608dbda4b21b3dc42c8a222419b.pdf
    • https://static.usrfiles.com/ugd/d5415a_e411c82dff184087b3b2cc5c900600f9.pdf
    • https://static.usrfiles.com/ugd/47b1e8_5f305d338e96425cbfa776bfedbdd9b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_888f59ec70074bd3a5890c41ceb6bcb8.pdf
    • https://static.usrfiles.com/ugd/c345b0_94bd46036c1348979aa7ed565c92c49d.pdf
    • https://cdn.shopify.com/s/files/1/0465/0247/7982/files/xasida.pdf
    • https://cdn.shopify.com/s/files/1/0446/6999/3123/files/27288073531.pdf
    • https://cdn.shopify.com/s/files/1/0447/0145/0396/files/adolix_split_merge_full.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/chat_alternative_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/mixed_up_sentences_worksheet_ks1.pdf
    • https://cdn.shopify.com/s/files/1/0439/3343/4011/files/learning_style_visual_auditory_kinesthetic.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_off000058e3.bin
e76d7e202b3330896335e033f681874e1161a61ad78316b479658dcce6215daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E3 5528 bytes
font_01_sfnt_off00006bba.bin
12008f6b2fd34adc1e673de84d286f36c22154fa451462ce4389028460331b58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBA 10720 bytes

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