Malicious PDF — malware analysis report

Static analysis result for SHA-256 179c1a8ef93640a4…

MALICIOUS

PDF

57.1 KB Created: 2020-08-06 00:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c952e09cdd1d5af9ede77cd66d1f547 SHA-1: f00b0f6d77e53424f37c0080b6bba44aaec4a3f7 SHA-256: 179c1a8ef93640a4492902519a18f537f4bac1bd380966691b2094fd3a2fb071
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL. The document body, though heavily corrupted, contains text suggesting it is a dictionary, which is likely a lure to encourage users to click the malicious links. The primary malicious URL identified is https://ttraff.com/pify?keyword=diccionario+ingles+espa%25C3%25B1ol+de+administracion+de+empresas+pdf, which is flagged as a malicious redirector.

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=diccionario+ingles+espa%25C3%25B1ol+de+administracion+de+empresas+pdf
    • http://files.artculturetourism.co.uk/uploads/1/3/1/4/131454634/kofazibug.pdf
    • http://files.merseamuddshack.com/uploads/1/3/1/1/131164202/mirunejupeneg-rosotafewoxi-ririnabip.pdf
    • http://files.paulbunyantax.com/uploads/1/3/0/9/130969424/2686f37bd15df.pdf
    • http://files.yarnonyouree.com/uploads/1/3/0/7/130776350/04b145b23c40bd.pdf
    • http://files.nokaloosacert.org/uploads/1/3/1/4/131437627/gazirezesuliwuk_fegawiwudusuvon_vifejunezow_petalim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/95855939261.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/logilinapazus.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/cold_steel_special_projects.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/muvejebubibotujiketutanum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/52234160411.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/wugizixebudin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/logajojekiketiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4885/files/gibuwilozuwerunibo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/kaserofegodev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/89363325815.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c13.bin
7872befba9e9b811ed46ebbfa42a9d26e336f45cf0cf31a27c1b0f9562fa9d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C13 4192 bytes
font_01_sfnt_off00008aca.bin
e42ee3cbe6aa21fc009a254cafdaea9819f664487213177ec678613b7bfddb59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACA 5684 bytes
font_02_sfnt_off00009dd1.bin
a380d0b5693ce7397d524943e0d6ed711fb505b58ae02da0a3b1d2466c529716		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD1 18132 bytes

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