Malicious PDF — malware analysis report

Static analysis result for SHA-256 11acd96757c9f05d…

MALICIOUS

PDF

40.2 KB Created: 2020-08-17 13:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2406b71b4134770f124d9b8b1af53832 SHA-1: a2598acf37d97201c50b92fd9a6217ead2335de4 SHA-256: 11acd96757c9f05d223c34204330a2036fdaaa469741735233956e7e72489358
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a primary redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=toyota+auris+2008+workshop+manual', which is flagged as malicious. The presence of multiple Shopify links suggests an attempt to blend malicious links with seemingly benign ones to evade detection.

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=toyota+auris+2008+workshop+manual
    • http://taropil.allitteratur.com/uploads/1/3/0/7/130776688/zotusaradut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9590150980.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6766/files/50448274213.pdf
    • https://cdn.shopify.com/s/files/1/0450/3057/2190/files/brian_weiss_miracles_happen.pdf
    • https://cdn.shopify.com/s/files/1/0433/3794/1160/files/tamil_meaning_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/presente_perfecto_simple_en_ingles_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/nedirutaf.pdf
    • https://cdn.shopify.com/s/files/1/0454/7251/4206/files/duxeruro.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/medizawunupuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/9114778041.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000549f.bin
e467eee2279a04f2cb5d748c20550704c51c27a1373a0882fa4c73d2cdcd37d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x549F 5732 bytes
font_01_sfnt_off00006811.bin
9d4ae4c8bbe69aa1e20372e1364ef321f273a3affcfd729a5426df61a21a2a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6811 14340 bytes

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