Malicious PDF — malware analysis report

Static analysis result for SHA-256 b297cdc8c909b830…

MALICIOUS

PDF

44.1 KB Created: 2020-08-17 07:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d3f7332fba2e9a8ed6047f324a03f9f SHA-1: aa1610b7f6102e7d429fca124dba0fe6d8ab3152 SHA-256: b297cdc8c909b8303402cac8cfd8c02e24166d3ec7a17aa77b217b59593a89cd
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure (ttraff.com), and another identified a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. No scripts were extracted from this sample.

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.com/pify?keyword=tourism+new+zealand+annual+report
    • http://files.onyxbeautystudio.com/uploads/1/3/2/6/132681199/7234459.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/vaxupepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/labosejego.pdf
    • https://cdn.shopify.com/s/files/1/0450/7284/2915/files/bizexoniwesinakedem.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/34620567092.pdf
    • https://cdn.shopify.com/s/files/1/0428/5490/8071/files/supixeruwotabudarabixo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0678/6725/files/segixa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/gawumizitawas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/55657927830.pdf
    • https://cdn.shopify.com/s/files/1/0431/8887/9521/files/angle_bisector_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/30262846005.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_off00006e01.bin
bead71558aa714d1ca7c738bcf4f4bfa58c39e5089f0c2994674a9ead459345c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E01 5196 bytes
font_01_sfnt_off00007fb0.bin
4452757a2e39065dc5278c6f83dca33aa1c183d3d04fed84cc1e661dd4070a94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB0 10596 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.