Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12c78eb2b92451e…

MALICIOUS

PDF

55.9 KB Created: 2020-08-18 23:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 790b2481037c09630589a0cf5091e054 SHA-1: b096a52afa8f4089219264fd855aa4af9e78ca6e SHA-256: f12c78eb2b92451e1c7d3cf6e30e0c9f23b48fe8276404f9a44d08cf8424528e
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=aristoflex+hmb+pdf, which is likely intended to redirect users to a malicious site. The PDF also contains a PDF_SEO_LINK_FARM heuristic, suggesting it is part of a larger campaign to generate traffic through numerous linked PDFs.

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.cc/pify?keyword=aristoflex+hmb+pdf
    • http://files.middleschoolmind.com/uploads/1/3/0/8/130813796/regiwe_kijeja_pozux_fiwuli.pdf
    • http://jelejivig.soundsciencestrength.com/uploads/1/3/0/7/130738902/3e3f4050800.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/xagoga.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/38880158644.pdf
    • https://cdn.shopify.com/s/files/1/0440/7531/9448/files/5053004813.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2341/files/ditexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1177/files/81047484468.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4264/files/analytical_reasoning_sample_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/6417/2445/files/resolabizaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/846651182.pdf
    • https://cdn.shopify.com/s/files/1/0432/1882/9472/files/38233557052.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/zoruxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4992/files/67877276724.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/4904626394.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000844c.bin
6493983a1ad69f18dd2069e6d7a696c814e90dc6b56fa661a4312efc04debc3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x844C 5268 bytes
font_01_sfnt_off00009604.bin
fa5d29a49a5cddfe5569bca00e6d9651a11fcbc37cafa305c7648233dd46a5bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9604 6380 bytes
font_02_sfnt_off0000a6d9.bin
f81760b6c7b83ce34ca75299a74dcb6deb87614ad83428cc39336fcd99c57a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D9 14336 bytes

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