Malicious PDF — malware analysis report

Static analysis result for SHA-256 26300823233bec7b…

MALICIOUS

PDF

45.5 KB Created: 2020-08-11 02:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 801a89b914fd2337bfa18ec8ab22a4d1 SHA-1: 6affaa89d9af9c9ec2a1eed6c04d4243e3688594 SHA-256: 26300823233bec7babb890b493d7b8d49a82f049c8e4fb99df6b221b218441f5
128 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, disguised as a syllabus download. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted from this sample.

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=amu+b+tech+syllabus+2020+pdf+download
    • http://novufo.tanurhideboerne.com/uploads/1/3/1/3/131380213/17cb9a5.pdf
    • http://files.r3dband.com/uploads/1/3/0/7/130775245/442a6d9dc.pdf
    • http://files.bevingroup.com/uploads/1/3/0/7/130740323/4854237.pdf
    • http://files.thesetterfamily.com/uploads/1/3/1/0/131070604/xosil.pdf
    • https://cdn.shopify.com/s/files/1/0449/1522/8839/files/avinash_dixit_games_of_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0440/4323/9589/files/javascript_map_to_json.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/acid_derivatives.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/american_girl_collecting.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7255/files/sifiluw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/learn_spanish_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/bopatatubinibafebiwufep.pdf
    • https://cdn.shopify.com/s/files/1/0440/8419/9574/files/chrome_cast_extension.pdf
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/fonatawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/pastel_accounting_tutorials_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/2798/8634/files/visotoselarupupude.pdf
    • https://cdn.shopify.com/s/files/1/0439/4903/1592/files/88993059185.pdf
    • https://cdn.shopify.com/s/files/1/0437/2037/6474/files/boxawanafegurusixo.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_off000065d1.bin
ae1420e254787f11d37a42393a0c7fcd9f0aefa4684a0913ed5ddaa8054bec9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D1 5896 bytes
font_01_sfnt_off000079e0.bin
bb8ff777cc1dba7842dcae4a010b42a969d73eb6592ebda6c8f79719bf04e888
pdf-font-stream PDF embedded font (sfnt) at offset 0x79E0 14716 bytes