Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69218c4716a4baa…

MALICIOUS

PDF

52.1 KB Created: 2020-08-10 06:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c235de6f7610c8b25fa57786d059f30c SHA-1: d81184221e69bcb2102e39567fd7a2a05bb7dae7 SHA-256: d69218c4716a4baa0abb79ab5fba699af51fd3dc3180f9a48aed12d604580b33
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=types+of+agglutination+tests+pdf, is identified as a malicious redirector. The document body, though partially corrupted, includes the same URL and a document title suggesting a lure. This indicates the primary attack pattern is to redirect users to malicious infrastructure via a link farm embedded within the PDF.

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=types+of+agglutination+tests+pdf
    • http://xaliv.lifespringwesleyan.org/uploads/1/3/0/8/130874359/1692212.pdf
    • http://files.jacobstubbsonline.com/uploads/1/3/1/3/131382531/xigowobigifade_zenumerox_felowoliko.pdf
    • http://files.omsteadsonerie.com/uploads/1/3/1/4/131438567/bimoma-puvop-nixaziboso-wuwavivegoju.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/61389560294.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/lotemikaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/40891111741.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2636/files/pabunesazewodun.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/falola.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/suzanne_powell_alimentacin_consciente_libro.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/bronchiolitis_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/princeton_university_campus_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fenajowogotuxukat.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/bise_fsd_result_10th_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/salumofepazisitovox.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_off00008f69.bin
3a3461f4dfe23b42881672697bc5f6a2bbe86fca71fced2e18935d8b0f49d7da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F69 5164 bytes
font_01_sfnt_off0000a11f.bin
f9a812bde475b4af8d1879d668e9efd1657e0229db17f3429ea2e6e302b5d7b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA11F 10080 bytes

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