Malicious PDF — malware analysis report

Static analysis result for SHA-256 c584fbf8238e84fd…

MALICIOUS

PDF

54.1 KB Created: 2020-08-11 18:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80bae2a4b1a150d2686cbbd9915fa650 SHA-1: b53338b93f30b1bb408195adf7d4f641ee314ea1 SHA-256: c584fbf8238e84fd20d9eabf8a578b02d09cd932e947245ce5d96a56c9d23010
120 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, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of a link farm suggests an attempt to lure users to malicious sites, likely for phishing or malware distribution.

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/wb?keyword=acarology%20books%20pdf
    • http://files.evelandfarm.com/uploads/1/3/1/4/131436971/93088aafe1eb3.pdf
    • http://files.busybeeorganize.ca/uploads/1/3/0/9/130969004/gojebifazalomo-maxurapokenoxo.pdf
    • http://files.energizecolleges.org/uploads/1/3/1/0/131070611/cc21ae80.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/vipomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/95023864604.pdf
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/zetuxisokizupaluworutota.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/the_tournament_at_gorlan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/wivetuwuvasezinekig.pdf
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/bosch_ascenta_dishwasher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/53573538686.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8962/files/tasazowutoretuzitewoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/xalowikoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/kepapu.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_off00008f90.bin
f2c0836de058935ecc940eaf0a0a6c1b9d91d53248c6531def645cdec4072011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F90 5620 bytes
font_01_sfnt_off0000a2c2.bin
270ffd1dd5e633e70dd745eaf22b7bbe19c09a8e9e770097ef9fe24bab487917		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C2 13052 bytes

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