Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc2e8b0d442932b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 02:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd8751c63fe9f1ec30d7648fde860ed2 SHA-1: 89650a492649688b910532eaf22f7f60b9fc2b6c SHA-256: 3cc2e8b0d442932b1a556519e70b4cb818be1f549dbcebbd1494ee2d2a72860b
150 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for an 'attendance app' and includes the malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious payload.

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/pify?keyword=my+attendance+app
    • http://diduwon.silverdalevillagemarket.co.nz/uploads/1/3/1/3/131398404/tilajoxixejep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lawup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3516/files/kulizisolizasubadewezitom.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/kavafupaponik.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/23453420140.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/belajar_tajwid_praktis.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/42927127673.pdf
    • https://cdn.shopify.com/s/files/1/0440/8089/0008/files/74779129189.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/dewex.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/death_note_full_movie_english_dub.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/45657136411.pdf
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/fazevovunikilemiwarin.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0413/files/97028331644.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.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_off00006817.bin
c201fa90c77bc2f1b85550c93be47135eec208f50e784ceacd0b08f3f5f9c2aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6817 4868 bytes
font_01_sfnt_off000078bd.bin
f94d373e30e5177b7ab5ce4d8158cd65ae648401c94ad7c2d0b6992b8c2c7c97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BD 9820 bytes

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