Malicious PDF — malware analysis report

Static analysis result for SHA-256 189fae649e0e5e42…

MALICIOUS

PDF

39.2 KB Created: 2020-08-29 19:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84daabe3fac650620cd01e75d4bb8f99 SHA-1: e4df976608aa783c6cb31eaadc80529389f50c7c SHA-256: 189fae649e0e5e42716d509407223d60d1cd9ef50d34b5abde1b4c205a2a68a2
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a download lure. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links further supports a malicious intent, likely to drive traffic to malicious sites.

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.com/wix?keyword=powder+toy+download+weebly
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8b9728_bf37fd35ee6948869be4c224ba343943.pdf
    • https://static.usrfiles.com/ugd/7baf93_6f4eb9265441497d97f3d7809ed33b48.pdf
    • https://static.usrfiles.com/ugd/b8c837_85a02cd4e13f44c7a75ca7189ebe6650.pdf
    • https://static.usrfiles.com/ugd/b8c837_6320e2f996a340a7b011770f1914bdc7.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_5d86054e35894cfd9c424cafe4d98652.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/lexun.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/94134710564.pdf
    • https://cdn.shopify.com/s/files/1/0428/7794/3967/files/hemostasis_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/96138372582.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/jomapisabar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/animal_crossing_city_folk_wii_character_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/sixazedimeleresipifin.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9263/files/40232143328.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab96afde982e44ff8247b25864394a6b.pdf
    • https://static.usrfiles.com/ugd/c0b427_367d684345fe4e548a899567b85342cf.pdf
    • https://static.usrfiles.com/ugd/60933b_924614c149814e28ac7d84b0914e5837.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_off00005c6a.bin
01b5a748f6a30d86fdeb211ed548918a82ade73f697b5ce355c2538cfeaac071
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6A 4976 bytes
font_01_sfnt_off00006d75.bin
51ec4db8c190860e4934f855fe079b65c7814bc2c803dae4b3c783b37ffeb746
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D75 10080 bytes