Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d8b163e8834006…

MALICIOUS

PDF

44.1 KB Created: 2020-07-17 03:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c53d787307efa1b4de503afc418b6e91 SHA-1: 745f7173a0d147fcaafec3294062650051ef62c6 SHA-256: 07d8b163e8834006fc6bb369767a39f7548790efe5f4333fdaa22a11c0a71a14
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits a PDF link farm heuristic, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL suggests an attempt to lead the user to a malicious site, likely for phishing or malware delivery.

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.ru/wb?keyword=arcmate%20120ib%20manual
    • http://files.scottwardart.com/uploads/1/3/1/8/131871690/rukupasamexa.pdf
    • http://files.thespina.co.uk/uploads/1/3/1/3/131383294/c5adc0b7d78.pdf
    • http://files.janajedermann.com/uploads/1/3/1/3/131384081/xetemew_seleduwesawekib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/pugopugapepidepegetam.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/tofosenapob.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/vagek.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/zelizu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/turusilawujabonitez.pdf
    • https://legebepome.files.wordpress.com/2020/06/wexasowisatis.pdf
    • https://zekojepe.files.wordpress.com/2020/07/tobazofaxowopitaza.pdf
    • https://famunuguraj492377956.files.wordpress.com/2020/06/9984063616.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/69580409113.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/kusexij.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/73259007409.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigazisamakolomomabixefox.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/50837528048.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47475247643.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/rinivega.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/11887809034.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/bogaz.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_off00006e3b.bin
eb178b647a07d09536a8f69fac9a4bd5cb2dc046275785adbf60b4232b6385fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3B 4992 bytes
font_01_sfnt_off00007f0f.bin
45637479373c0ba39ec7e3503f469537921d2f21ded3858fc4501518c93ae584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0F 10488 bytes

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