Malicious PDF — malware analysis report

Static analysis result for SHA-256 10663ddeb9f929ba…

MALICIOUS

PDF

42.4 KB Created: 2020-08-01 10:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce41dd780f7ed9f0d8955f4e459d8ac6 SHA-1: d89d3d7c0fab461210ad5a8f8f94aafff5f24b45 SHA-256: 10663ddeb9f929bae34916d39481d594a21020cf7c5803edf998d91195b9fb90
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure for downloading content, which is a common tactic for distributing malware. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=wayne+grudem+systematic+theology+pdf+free+download
    • http://files.smithwlac.com/uploads/1/3/0/8/130874382/3a9d04cdcfd0.pdf
    • http://files.jinhui-mechanics.com/uploads/1/3/1/3/131383548/lewesedoros-xuganuxavo.pdf
    • http://files.michisboutique.com/uploads/1/3/1/3/131398547/5b6be.pdf
    • http://files.ionaabbeyandclandonald.com/uploads/1/3/2/6/132682119/4808946.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/ruxewalokan.pdf
    • https://cdn.shopify.com/s/files/1/0434/3611/4076/files/kubota_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/3999998909.pdf
    • https://cdn.shopify.com/s/files/1/0440/6919/1832/files/mepesebubixawewuwivameg.pdf
    • https://cdn.shopify.com/s/files/1/0437/0684/3288/files/74275587745.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/jetamoferi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/fekod.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/97675338208.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/89599623313.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1293/files/97292344726.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/xakolibiwejabadolurarimur.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/xufupebimorikudupewen.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634e.bin
92b8c82ae36e82c69182b774ceaf2d1111369b1a6c46407804f29f312ff74701
pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 5776 bytes
font_01_sfnt_off000076fa.bin
a2d82006c8b1ad511708584ad91f43ab3d940500b5a39de81d33886b601bad8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x76FA 11160 bytes