Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8752db470fe74f…

MALICIOUS

PDF

65.0 KB Created: 2020-08-05 04:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2af98ff714ae4b30e6cdfdbcff7ec22b SHA-1: 7934d7bffa3d38b3773629e5845de8a4de895154 SHA-256: ea8752db470fe74f208b0ceb23995db52861ef359c39ac0a377edad83767eaca
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Alternative dispute resolution pdf robeniol' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further indicates an attempt to distribute content or traffic through numerous external links.

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.cc/pify?keyword=alternative+dispute+resolution+pdf+robeniol
    • http://files.fundle.us/uploads/1/3/1/4/131438190/cb6c48e45ca.pdf
    • http://files.shootingcandidly.com/uploads/1/3/1/3/131383619/04733a73.pdf
    • http://files.danajaybein.com/uploads/1/3/2/8/132815767/pedozajugima.pdf
    • http://files.melissaebbe.com/uploads/1/3/1/6/131606453/85002bb.pdf
    • https://cdn.shopify.com/s/files/1/0429/1883/8435/files/51609774868.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/43374743793.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4070/files/99447127982.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/tenuzuwifojudotab.pdf
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/bhagwat_geeta_book_in_gujarati_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94393320092.pdf
    • https://cdn.shopify.com/s/files/1/0432/2272/8866/files/tiroguwitugeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/74856328250.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/pebumim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/vuvavazetiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/lebujixesaligipetuwor.pdf
    • https://cdn.shopify.com/s/files/1/0440/5172/6501/files/botum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/voposugibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/66624559354.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_off0000c2bc.bin
13bc53ff82014e2b3b96fa023e3f876161065b3a859632dd406ab9ede797d67c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BC 5224 bytes
font_01_sfnt_off0000d491.bin
39e922fced99411072e0b51d3ca1f36c45fd24c0fc5ea315948ec3a4a59ec46a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 9928 bytes

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