Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5511702b284b58…

MALICIOUS

PDF

38.6 KB Created: 2020-08-22 08:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65fdcadd53043885e3b1172631123b2c SHA-1: fbe6e10ff677e7901c377bb446a48bed826c9d8f SHA-256: ac5511702b284b582425940e613a45958af24fae730c1439b93a955b83641449
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=jacksonville+jaguars+injury+report+week+6'. This indicates an attempt to redirect the user to a malicious site. Additionally, the PDF was flagged for containing a link farm, suggesting a tactic to artificially inflate search engine rankings or distribute malicious links. The document body, though heavily obfuscated, contains the same URL and a reference to a PDF file hosted on cdn.shopify.com, which is likely part of the link farm.

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=jacksonville+jaguars+injury+report+week+6
    • http://files.flipconsultants.com/uploads/1/3/0/7/130740586/6921591.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/kozabij.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/serratus_anterior_stretch.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/19707709316.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8829/files/homer_simpson_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/9466/1538/files/aulularia_plauto_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7936/files/anonymity_and_confidentiality_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/realidades_2_capitulo_2a_page_35_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9265/files/pozimorudenopuxivajofal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/salukizujudizizulexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/lowes_springfield_il.pdf
    • https://cdn.shopify.com/s/files/1/0430/4453/6473/files/noguravixozoxukexubepa.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/fraction_word_problems_grade_7_worksheets.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_off000057ac.bin
dce522d6f8a989322bab5b0ae123f6ff0ad9d0665e184adeacdefa5e19727e0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57AC 5636 bytes
font_01_sfnt_off00006b12.bin
f49af89a23f8d4c2e992af74a7660e18280179c06d4f58c574b8f4552528a97d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B12 10040 bytes

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