Malicious PDF — malware analysis report

Static analysis result for SHA-256 20333e7e1dc919a5…

MALICIOUS

PDF

62.8 KB Created: 2020-08-28 04:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17f74ce919e7c9f7e767f07b45b94232 SHA-1: 8e951d3fb7ec08ad2ef5e1b43d91a10ef3e20156 SHA-256: 20333e7e1dc919a59565bc924a45436a6d50c73a54b6647d64061d2007b5ff66
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to its extensive use of external links, a technique often employed in SEO poisoning or phishing campaigns. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=soda+fired+ceramics', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of numerous Shopify-hosted PDF links suggests an attempt to disguise malicious content within a seemingly legitimate platform.

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/pify?keyword=soda+fired+ceramics
    • http://vozorer.revitalizeyourself.net/uploads/1/3/1/0/131070450/4597982.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/rajixalosatinovol.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/woxomawuzuronitokedivo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/59462808165.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/3389918781.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/73716191155.pdf
    • https://cdn.shopify.com/s/files/1/0448/0519/3885/files/applebees_menu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/xozovilakenadetawazugifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/laraku.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9745/files/gw2_scourge_build_pve.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/linchpin_are_you_indispensable.pdf
    • https://cdn.shopify.com/s/files/1/0446/8424/7193/files/94341380957.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/23110111278.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abcf.bin
dd58538b6ac7c66f4ee8186d2efe096e4918f1c3d876ec857bc4219ea0ea1a6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xABCF 4840 bytes
font_01_sfnt_off0000bc34.bin
3645022615038084432f88cf84b8cbdb4c946809ae0a78b2dfca9abb903c478c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC34 10536 bytes
font_02_sfnt_off0000e02f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xE02F 4324 bytes