Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e3889c0cc2f1e6…

MALICIOUS

PDF

40.1 KB Created: 2020-07-20 07:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c96bd2a30eac8d9b5103d0ab6dd4510 SHA-1: 7deb28ce56aad53f58c2e19d904432ab1d2ad23c SHA-256: 33e3889c0cc2f1e67cdb05bf516cf5b3ad81bd1511a67f68d7889b6035daa6e5
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 30 external PDF links, many pointing to WordPress hosted files, and one critical link to a known malicious redirector. The ML classifier strongly indicates maliciousness. The primary malicious URL is https://ttraff.com/pify?keyword=netflix+for+android+tv+box+apk, which is likely used to redirect users to a phishing or malware distribution site.

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=netflix+for+android+tv+box+apk
    • http://files.barebeautymilnrow.com/uploads/1/3/1/3/131384583/panukijov-zosalexa-jidaxujexiluzal-suzitarefol.pdf
    • http://files.dillooni.com/uploads/1/3/0/7/130739688/23db1f4fda.pdf
    • http://files.artclassonline.net/uploads/1/3/1/3/131384660/b73270c19b432.pdf
    • http://files.muskokaautumnstudiotour.com/uploads/1/3/1/6/131606256/devusamilejo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://gimasesagix.files.wordpress.com/2020/06/36102986132.pdf
    • https://fedokiseled.files.wordpress.com/2020/07/legovamujuna.pdf
    • https://xosezeke.files.wordpress.com/2020/06/73713892770.pdf
    • https://mabekazasoro.files.wordpress.com/2020/06/xijoxidotovubunitaxanuw.pdf
    • https://xurogutu62174654.files.wordpress.com/2020/07/94647294378.pdf
    • https://lazevozazu.files.wordpress.com/2020/07/26847524768.pdf
    • https://motakorop.files.wordpress.com/2020/07/sovodimudidezemogemuwevam.pdf
    • https://zivudubu.files.wordpress.com/2020/06/wolaragitobumatapevan.pdf
    • https://sifuvuviluz.files.wordpress.com/2020/06/paxanonuragabitazalijurar.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/57588409998.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/87785733028.pdf
    • https://cdn.shopify.com/s/files/1/0431/4041/5644/files/nezaribepibidamipi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/76967229772.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/tofuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9288/files/wufavivupimiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/tezimobudukilesataximune.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_off000060d0.bin
cbfd91de9210f42eb0ff5dd05df05b1e27d8550bda20d70cc7a62f810517c173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D0 4948 bytes
font_01_sfnt_off000071b3.bin
a49b8da48d915b09f144c857e4d58d71904bcbd56165464b53e17eae4afba91b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B3 9740 bytes

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