Malicious PDF — malware analysis report

Static analysis result for SHA-256 126c84f2832e14db…

MALICIOUS

PDF

43.2 KB Created: 2020-08-25 09:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcfcf49b6a3cc5554d2fbdf109883c5d SHA-1: 2c02254d1b57f2d81bb2635941a3a16b0b911c31 SHA-256: 126c84f2832e14dbcb93b8f8422084ddfc02545d9921b25780a6a1be78911d74
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=etnocentrismo+y+androcentrismo+pdf'. The ML classifier also strongly indicated maliciousness. The document's purpose appears to be to drive traffic to these linked resources, potentially for SEO manipulation or to distribute further malicious content.

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=etnocentrismo+y+androcentrismo+pdf
    • http://files.trueembodiment.com/uploads/1/3/0/9/130969300/7937817.pdf
    • http://files.lutheransanjuans.org/uploads/1/3/0/7/130740249/dupimabub.pdf
    • http://wodipikiz.gracechristianmusicfestival.com/uploads/1/3/1/4/131406687/7548030.pdf
    • http://rujum.serenitynowvacation.com/uploads/1/3/0/7/130738748/9157045.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5933/7621/files/vaxovodorikileto.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/80257821027.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/avast_latest_version_with_crack_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/fanosep.pdf
    • https://cdn.shopify.com/s/files/1/0435/3150/1720/files/braum_s_nutritional_information_chocolate_shake.pdf
    • https://cdn.shopify.com/s/files/1/0454/4416/9878/files/moral_panic_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/dremel_4000_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0443/9041/6550/files/mastering_metrics_chapter_3.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_off00006497.bin
0c9da4eebd31df2c529c0697244db11221f0064d6676e6b6c20eb0d12075fe14
pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5328 bytes
font_01_sfnt_off000076a2.bin
a80cdaed53e419b2f196223d590058712dc49abad9ff682d140ed465dc97211d
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A2 12388 bytes