Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b2122f4eda4bea…

MALICIOUS

PDF

47.3 KB Created: 2020-08-08 17:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a44f5b0382513ac753a6cbcbc01f1319 SHA-1: 55160c40748f28183937539a114cf88b31ed31fa SHA-256: 42b2122f4eda4beabfa9b19b78abe414c583b15dae9e5c8ec510e08543cbeaf4
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=biblia+pdf+reina+valera+1960+gratis, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains this URL and other benign-looking Shopify URLs, suggesting a lure for free PDF downloads. No scripts were extracted from this sample.

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.ru/pify?keyword=biblia+pdf+reina+valera+1960+gratis
    • http://files.allearround.com/uploads/1/3/0/8/130874326/1682035.pdf
    • http://files.nvcfa.org/uploads/1/3/0/8/130873737/1458bac65ef8abc.pdf
    • http://files.ballisticstrength.ca/uploads/1/3/1/4/131407178/a6a08283b7756d.pdf
    • http://files.bluu.zone/uploads/1/3/0/9/130969791/e9a727b75.pdf
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/latonowapobukuk.pdf
    • https://cdn.shopify.com/s/files/1/0444/4323/8567/files/catecismo_da_igreja_catlica_livro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/81016151356.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/99639723927.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/81474091866.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/42975619957.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5873/files/9800419327.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/finarakosuxoxesanivefifut.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/54455050517.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1817/files/18988595866.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/23229179912.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/bhakti_and_sufi_movement_upsc.pdf
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/67497141262.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_off00006c1e.bin
8c4bdb3b137d129a2a43ca2ff7594f3d235a16fb37f09387bba7be72687a30c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 5964 bytes
font_01_sfnt_off00008077.bin
6aa82955e117d44a43ee3f00d38721e5a856e0beaa5e9be21e4b15ad85f5f80c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8077 3120 bytes
font_02_sfnt_off00008cfc.bin
51ec1625bf8cbc868336356f9b124d3cb2cff82f0b8278c4d8b74866f3439845
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFC 10088 bytes