Malicious PDF — malware analysis report

Static analysis result for SHA-256 94982f9a9f1cf9f6…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 03:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1eefefbe512c9348d685d4c3fb1250d SHA-1: 76a068d190aa548435a552643a0a22547ff9c5fa SHA-256: 94982f9a9f1cf9f6d93e4d36a30041373dfdd81ba8d86da6502b2e5421cf1dbf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=comcast+email+on+android+stopped+working'. This URL is likely part of a phishing or scam campaign designed to trick users into clicking through to malicious content. The document body, though heavily obfuscated, also contains this URL and other links, reinforcing the phishing lure. The presence of a link farm heuristic further suggests an attempt to manipulate search engine results or distribute malicious links.

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.ru/pify?keyword=comcast+email+on+android+stopped+working
    • http://files.humansofbss.com/uploads/1/3/1/0/131070561/33c91.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/27930093679.pdf
    • https://cdn.shopify.com/s/files/1/0432/5507/0880/files/lerasidoxusepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/18171684792.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/sound_of_silence_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudivilijekeroleve.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/angular_form_control_set_value_example.pdf
    • https://cdn.shopify.com/s/files/1/0439/5224/2856/files/tevoresiwupofexav.pdf
    • https://cdn.shopify.com/s/files/1/0435/8710/9023/files/25873417731.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/24117225537.pdf
    • https://cdn.shopify.com/s/files/1/0435/1688/7192/files/62164382048.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8376/files/79114322676.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_off00005b38.bin
5e6d7d3c19e2fde1662c8ac1ed5b60829e718a1349ff6fd6cb6450e25e28c02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B38 5456 bytes
font_01_sfnt_off00006db7.bin
fbcea737d414bd7f1972bd857a63d3971949feeb2a5144bc6b3da0b6df2db564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB7 10144 bytes

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