Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47619641bf8e3a4…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 20:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1087e99c36256143c8358fabeb53aae SHA-1: 98b6086dd2263adf49e399d95aa3398692dc1b76 SHA-256: f47619641bf8e3a466d70c6a0c2a344dd8e449ab2378f819c02777592d839979
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains known for hosting malicious content or redirecting to it. Specifically, the URL 'https://ttraff.ru/pify?keyword=diferencia+entre+antigeno+y+anticuerpo+pdf' is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous links to Shopify domains, some benign and some unknown, indicates a strategy to mask the malicious intent within a larger collection of links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=diferencia+entre+antigeno+y+anticuerpo+pdf
    • http://files.phoenixspiritz.com/uploads/1/3/0/8/130874130/kinakufiloma.pdf
    • http://files.gorboduc.com/uploads/1/3/1/4/131437276/2465617.pdf
    • http://files.crosbyirontonmusic.org/uploads/1/3/0/7/130775364/susepep.pdf
    • http://files.rivieranayarit.ca/uploads/1/3/0/7/130776208/retabejulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/atkins_meal_plan_phase_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/19095061164.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/73880364170.pdf
    • https://cdn.shopify.com/s/files/1/0437/8322/5506/files/14560130083.pdf
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/receptores_de_angiotensina_2.pdf
    • https://cdn.shopify.com/s/files/1/0450/5042/9598/files/photobucket_album_downloader_firefox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/58836116516.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/powotoviwizefume.pdf
    • https://cdn.shopify.com/s/files/1/0431/9785/7954/files/tawexiwujerakag.pdf
    • https://cdn.shopify.com/s/files/1/0434/4745/1798/files/mito_di_amore_e_psiche.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/monamapo.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_off00006625.bin
df298eb7c78c8a00e4e7afaca7a24560b3396e08ac535f53562132a4aa08484b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6625 5216 bytes
font_01_sfnt_off000077f8.bin
3f4c70a2d72ea4c6153b9fdb5ee508fffe9858b46f3a2fd977fe36f88c56d8b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F8 11216 bytes

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