Malicious PDF — malware analysis report

Static analysis result for SHA-256 124469abc79bcec6…

MALICIOUS

PDF

36.1 KB Created: 2020-08-10 12:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6880de63f65898b56a6ba4cfcb494155 SHA-1: 203faf64849f62c7ac00966480073799772ffe45 SHA-256: 124469abc79bcec66c387fc0e8e200da6f48fe8dc8abbfb61fa4f3ae7387dd20
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a way to access a 'Watchmen comic pdf reddit'. The document also contains a large number of links to other PDFs hosted on Shopify and other domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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=watchmen+comic+pdf+reddit
    • http://files.visuallyaccessiblecities.ca/uploads/1/3/0/8/130874490/9278987.pdf
    • http://files.brailesshow.com/uploads/1/3/0/7/130739269/9de9ad6ad4b1.pdf
    • http://files.noahsarkquarryville.com/uploads/1/3/1/3/131383924/gaxosatel_bizufodalug_vukupuxemazof.pdf
    • http://files.arttalkcollective.com/uploads/1/3/1/8/131872055/6c3b4ef9df751f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/84904593431.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2559/files/rupodafijumuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/titujipirakurivibedaketus.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/11299665509.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/tapezadojijasulijun.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/musuxufokamotabaterofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/58195123470.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/sigivugagibifuvowalesupad.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/6714029950.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/47574892161.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dijupabexapuvasazanuripik.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/tofituma.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_off00005115.bin
7c6b5dd24cce767e9bd2cff348a67a6ba2b8b24f1f67efb0eb57bc312313c415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5115 5200 bytes
font_01_sfnt_off000062aa.bin
a72d1580c96d144075a45e4a9515506e62a6dacded11811402fe78cc59b20e39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 9648 bytes

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