Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8e77c6ff2ed6ca…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 23:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55f7a890c02bcf5d13a41e2343602c92 SHA-1: 018bddb0795730dcc8c11972d9dff348fb7d667b SHA-256: 8e8e77c6ff2ed6ca46d6919787fee9fb8e2fd7a0c1429a2c4223936f12140aba
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Punching shear calculation' and a URL that appears to be part of a link farm designed to attract traffic. The presence of a malicious redirector suggests an attempt to lead the user to a harmful site, likely for further exploitation or credential harvesting.

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/wix?keyword=punching+shear+calculation
    • https://static.usrfiles.com/ugd/d9d1f5_6c611ac4ff5242c2b55a51c00bf189d2.pdf
    • https://static.usrfiles.com/ugd/704566_b61339d6055b49ceb7d2f0350af41b9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_245ffa7f2bc344569f12a01034556000.pdf
    • https://static.usrfiles.com/ugd/e1d12c_9f20e87feb2442d1a4e3b973dd1a3e82.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/43633703652.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5798/files/tirivibesowoguwis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9967/6060/files/wuxokusesixomagusopavugo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1287/files/57023093089.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/81201817353.pdf
    • https://cdn.shopify.com/s/files/1/0452/1882/4343/files/android_game_mod_hack_facebook.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/94621258981.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/32642848743.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_off00006647.bin
9f22ceb008e217333c689ea9e3d89b5ffd090bd0d2c43166fba1da2668ec160c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6647 5060 bytes
font_01_sfnt_off0000776c.bin
0d69b9fabaea9a03ec893eae01e41c52c83b31d454e2f6b04cef8857b1d4a5e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776C 9964 bytes

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