Malicious PDF — malware analysis report

Static analysis result for SHA-256 b972b0654ac6cfa6…

MALICIOUS

PDF

37.7 KB Created: 2020-07-28 04:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd454eec88fd51048abdeb958855854a SHA-1: 12bb7ec216cef9a6bad72694fcdb93397234437e SHA-256: b972b0654ac6cfa618e20a0d4e1f1605161b12620fa16b6a8a806435c63d5d78
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, disguised as a download for Java 8 JDK. This is further supported by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics, indicating a deliberate attempt to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the document body and heuristics point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=java+8+jdk++without+account
    • http://files.rockingcleatherandboutique.com/uploads/1/3/1/3/131383510/7375545.pdf
    • http://files.seatome3.com/uploads/1/3/1/1/131163959/9ecbbee.pdf
    • http://files.raphaelschwartzman.com/uploads/1/3/0/7/130775506/c079102.pdf
    • http://files.raphaelschwartzman.com/uploads/1/3/0/7/13077
    • https://cdn.shopify.com/s/files/1/0428/9540/9311/files/vesaleforidofawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/gefixeruzegojopukokida.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/87597171255.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/75728123609.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/tetikajodugidekixi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/66774189042.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/madelexane.pdf
    • https://cdn.shopify.com/s/files/1/0430/3690/1527/files/22805824511.pdf
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/16998606862.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/polonafebomi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/22881601042.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/kanamokuvopuzizubulemuju.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_off000056eb.bin
004e7b34f94287ff2fb53b705c4b63f0b5031ea1e97f798daeb0e68138e22fa7
pdf-font-stream PDF embedded font (sfnt) at offset 0x56EB 4960 bytes
font_01_sfnt_off000067d1.bin
0e387e5df7529edc5f6c57a1f306e407c41401eb7a848b7058bf94c03ef8085f
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D1 9920 bytes