Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ca49a39506fc24…

MALICIOUS

PDF

41.7 KB Created: 2020-08-25 10:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 212a68ccaa37d2e7065737345d11dd1c SHA-1: 67305181251cb302aa9ca2c1e040a25121ccbe96 SHA-256: c4ca49a39506fc2493fe21b2ecacc40dacdb75fac607355fc2d75434c1ce1a4b
130 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Opera mini browser' and a download lure, suggesting a social engineering tactic to trick users into clicking the malicious link. The presence of a link farm further supports the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=opera+mini+browser+for+windows+7
    • http://files.adentapoland.com/uploads/1/3/0/8/130874582/nilanuw-mivokafagej-vuxazosex.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/kizonifiweroxekeri.pdf
    • https://cdn.shopify.com/s/files/1/0437/7382/1082/files/56784517794.pdf
    • https://cdn.shopify.com/s/files/1/0451/0230/1349/files/sword_art_online_alicization_light_novel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/62457808332.pdf
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/sutogikefepetidud.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/gadebilodevagidadexoka.pdf
    • https://cdn.shopify.com/s/files/1/0433/9957/7756/files/calendar_template_excel_2010.pdf
    • https://cdn.shopify.com/s/files/1/0466/5144/1317/files/85383523773.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/les_infortunes_de_la_belle_au_bois_dormant_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/11681466572.pdf
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/xanetoxabelovis.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_off000064fd.bin
99d063153e7ffd6d5046209f77b7ac89ff66655f13867644bc2c33a42ba5c8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FD 5496 bytes
font_01_sfnt_off0000779c.bin
60e06d9a710ce725cb928447bb4e8884161ef434943000724467d5a0bc9c80dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x779C 10456 bytes

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