Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2aef83dbd41913…

MALICIOUS

PDF

44.0 KB Created: 2020-08-02 10:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e3af5a92e6b663a0af1c54e5d70dfba SHA-1: 3674e271174e1ee256d8f0a59cd8bfcdc2dc0d58 SHA-256: ae2aef83dbd41913d584f1f569aae67f973c834ca9ef52c3df3ba40ee63c37cf
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of numerous links, including those pointing to Shopify domains and other file-hosting services, suggests a link farm designed to distribute malicious content or phishing lures. No scripts were extracted from this sample.

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/pify?keyword=sora+anti+form
    • http://files.ceceliazorn.com/uploads/1/3/0/7/130739783/jurufufojes_fusar.pdf
    • http://files.nhsafelock.com/uploads/1/3/2/6/132682106/tadabuka_jarerofof_jibowokunikebi.pdf
    • http://files.miamipalmetto68reunion.com/uploads/1/3/1/4/131438113/6960413.pdf
    • http://files.heritageschoolofdiscovery.com/uploads/1/3/1/6/131607440/29cf65241ca7.pdf
    • http://files.keepsaladobeautiful.com/uploads/1/3/1/4/131482886/gumigow-putir-sufitovuvuju-dilufet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/gejufuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/tokibuwivupuxefesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/fawujomaxebaneb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/3301351476.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/92846306875.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/givux.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/vuzobavub.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/mapepipuwivujomitus.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4173/files/42916949428.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d7.bin
b262015709f72eabf66616975355b81f306137fa23513f82ae50bc67ce22ccf9
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 3724 bytes
font_01_sfnt_off00007010.bin
fb3e45aad896192177409b9ea1cea8746a5c258381b047c3af0deb4365eded15
pdf-font-stream PDF embedded font (sfnt) at offset 0x7010 4808 bytes
font_02_sfnt_off00008050.bin
9da729a279f508c63809fc18e76d3a5988d312826e7d75c254752ad00158f12e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8050 10264 bytes