Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c41cf91108fa956…

MALICIOUS

PDF

45.9 KB Created: 2020-07-21 16:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df556873f46c8c25765c2942e476b016 SHA-1: b7ba66e3e6a4fc0fdca4252813031b34cbe08809 SHA-256: 7c41cf91108fa95616f4b65c79983ca6743c7ca1e38a2124fca4ed272aad617e
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 ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to legal interpretation, likely intended to trick users into clicking the malicious link. No scripts were extracted, but the presence of a malicious redirector is a high-confidence indicator of a phishing or malware delivery attempt.

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=bennion+on+statutory+interpretation+pdf
    • http://files.eatndrink.com/uploads/1/3/1/1/131163564/makunujajulav.pdf
    • http://files.connectedpropertyinvestment.co.uk/uploads/1/3/1/3/131384679/dikelo.pdf
    • http://files.annetterouleau.com/uploads/1/3/0/7/130775772/8046026.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zizamazigunonafimav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63032467643.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/jemevemu.pdf
    • https://xowagibiwu.files.wordpress.com/2020/06/zisedirorov.pdf
    • https://jenonep.files.wordpress.com/2020/06/kaxenewizulibokakagemas.pdf
    • https://datafekodeba.files.wordpress.com/2020/07/bederujizasiwatisuvuge.pdf
    • https://xotagesison.files.wordpress.com/2020/07/sugunaxe.pdf
    • https://suwodofetet.files.wordpress.com/2020/07/91204666558.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0441/1519/8104/files/32357828448.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/nujes.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/6324831920.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/49613917388.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/duzemegosu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/runodekevos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/5468615090.pdf
    • https://cdn.shopify.com/s/files/1/0431/8943/6580/files/zejevunavavopivutamitu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/wiragedufevelubulit.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/
    • https://jenonep.files.wordpress.com/2020/06/kaxenewizulibokakagemas.pd

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065af.bin
1bb39b92527d0809de48c8919ffa3fde7b875836258262b5c5ced2af02c2665a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 5036 bytes
font_01_sfnt_off000076db.bin
d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DB 6068 bytes
font_02_sfnt_off0000868c.bin
afa76ea447e9056d2408a5b3d67018dc17c3045bb1b79bb9a7852d02746a47b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868C 10400 bytes

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