Malicious PDF — malware analysis report

Static analysis result for SHA-256 501d8526fd45931a…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 21:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 201eec542c3132461ce5cc7fd65df4c1 SHA-1: 6719797982e478f1bbeccee9dd616f48602bf3d9 SHA-256: 501d8526fd45931a0a58901877680e0dfe66b1e997edc63b74c098fe9dba7100
154 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding numerous links to other PDFs hosted on Shopify. One of these links, however, redirects to a known malicious domain, suggesting a potential phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/wix?keyword=gangstar+new+orleans+apk+data
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/59487469234.pdf
    • https://cdn.shopify.com/s/files/1/0434/8153/0534/files/29466489169.pdf
    • https://cdn.shopify.com/s/files/1/0454/3024/3484/files/baby_cat_hd_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/pixelmon_hard_stone.pdf
    • https://static.usrfiles.com/ugd/b8c837_54174a709f984c2095b8e28430d22a9e.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/66890626665.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/cover_lagu_tami_aulia_hampa.pdf
    • https://cdn.shopify.com/s/files/1/0438/5252/9829/files/marvel_avengers_academy_game_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0436/0706/4734/files/dealer_reports_spanish_fork_utah.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/paradise_lost_book_9_modern_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/93871379985.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_off00005d5f.bin
1bbd694d234615a30624a90a06a338122a8df8eb71b6ca7e0eabad848bdad253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5F 5312 bytes
font_01_sfnt_off00006f9b.bin
36d192382f7820841d590811958915f75d1ca8cf54aa4386afe81a972901b9da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9B 15188 bytes

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