Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24632b11e3a12c8…

MALICIOUS

PDF

47.2 KB Created: 2020-08-09 19:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ed4ab54d5dce3eec9c943c2c26bac4 SHA-1: 184687d5a9f317af35ede006922b21e02235aa42 SHA-256: f24632b11e3a12c827157462d071f6767ecc19e8a7a817f02d68fe1e708c3d3e
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a document about bromazepam. The document also functions as a link farm, pointing to numerous other PDFs hosted on various domains, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bromazepam+6mg+bula+pdf
    • http://files.lakegracecrc.net/uploads/1/3/1/4/131411024/1934617.pdf
    • http://mumatur.gilliamschools.com/uploads/1/3/1/3/131380213/pojuk.pdf
    • http://files.theartofalainponcelet.com/uploads/1/3/2/7/132741169/9636384.pdf
    • http://files.singularinsight.com/uploads/1/3/0/8/130874015/tifuxagadobaku_titiferemi_xipisufulit.pdf
    • http://pawok.nicetynecessities.com/uploads/1/3/0/7/130775506/kufevokik-tusagas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7928/6428/files/ruripadavubixarebupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/14415341447.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/midapatidiniwowuperolenod.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/badijevuxenajukitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/grammy_awards_2020_winners_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/3759236716.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/difference_between_bivariate_and_multivariate_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7291/3557/files/english_test_basic.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8641/files/enrolled_agent_salary.pdf
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/18252405490.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/49517851341.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_off00007a20.bin
6fe2bdd4cda40a8c9bac12b6e8e9c5483fc7b34ca38f26c02e6e894c968290a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 5576 bytes
font_01_sfnt_off00008d0a.bin
4e78d351b4a789f6da6010c7f12f7a44956f72d58ddb524575be7a873a20c1ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0A 10208 bytes