Malicious PDF — malware analysis report

Static analysis result for SHA-256 392c8d2190d76f64…

MALICIOUS

PDF

44.3 KB Created: 2020-08-08 12:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2e2dadf56e3cd2137af290194684bc1 SHA-1: 193ce5c5addabf11541c86bc606431fcd60304e0 SHA-256: 392c8d2190d76f649b69fc303b8db4e8417377ff0dbaf0f123d450729b70e5d4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=hikvision+cctv+camera+installation+pdf', points to known malicious redirector infrastructure. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly legitimate, but ultimately compromised, domains. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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/pify?keyword=hikvision+cctv+camera+installation+pdf
    • http://zakafig.michelsacademy.com/uploads/1/3/1/0/131070374/vosubudo-zazikovonimufo-zuzoterikodumaf.pdf
    • http://files.carolmears.com/uploads/1/3/1/8/131871390/3243503.pdf
    • http://tunuse.perception-percepcion.com/uploads/1/3/1/4/131406390/budewefelosafaz-pikimaligokaki-zuzoza-gobaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/large_scale_distributed_deep_networks.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/glencoe_science_physics_principles_and_problems.pdf
    • https://cdn.shopify.com/s/files/1/0434/2307/2412/files/rowetopugonuzu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/33423195162.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/jidotodarutujinoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/96997367981.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/5625126111.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/pabugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/mipovisaraxaxevitunez.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/ambiente_de_aprendizaje_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/3913/7697/files/favulogosaguvizizurala.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/exercices_avec_avoir_et_etre_au_present.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/97842142390.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006399.bin
8e405fe9f8664c4d685f46c872af1446b0bcea7d953616674e46a86d794939fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6399 5384 bytes
font_01_sfnt_off000075dd.bin
8b7cee03b15351ba08dd25ecc6573e76ecb53a31b217b2e4649b830951872841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 14880 bytes

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