Malicious PDF — malware analysis report

Static analysis result for SHA-256 f88a94ccc47cd6d9…

MALICIOUS

PDF

48.1 KB Created: 2020-08-30 15:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8436491257bd814cb8767bc35493cf6d SHA-1: b3d1c11f3a3d5bb359568c900485fbfbea09bf7b SHA-256: f88a94ccc47cd6d964b09ae24930fc66db710369ae12149b1ea2fab8b0b0fe07
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/wix?keyword=viecoi+l%25E1%25BB%25ABa+%25C4%2591%25E1%25BA%25A3o, which likely serves as a lure to a malicious site. The document body contains garbled text but includes the malicious URL, suggesting an attempt to disguise malicious content as legitimate. No scripts were extracted, limiting the analysis of further stages.

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/wix?keyword=viecoi+l%25E1%25BB%25ABa+%25C4%2591%25E1%25BA%25A3o
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/nolajedazozisopuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/chronicle_of_a_death_foretold_critical_essays.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/vixifegukesozogaxixusaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/8330863803.pdf
    • https://static.usrfiles.com/ugd/b8c837_81a1a1ea9071436fa46061a6bd567d35.pdf
    • https://static.usrfiles.com/ugd/edb4a7_0cdbb1512fd340b3916c9bd32f0d7390.pdf
    • https://static.usrfiles.com/ugd/b8c837_166c2572ac0f4f4cb0fb9d9da2efbf97.pdf
    • https://cdn.shopify.com/s/files/1/0435/5742/1224/files/angular_form_group_array.pdf
    • https://cdn.shopify.com/s/files/1/0449/5792/5544/files/vibrant_matter_a_political_ecology_of_things.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/xesuwanofodijiwulaxumiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/66650103955.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_off00005b8d.bin
d3b0bf887d9869889baf73a1b639ac2ed620a218a06216ad7e873a3e5a2cbdf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8D 5068 bytes
font_01_sfnt_off00006c39.bin
7a899d67c891a29197ff3f21e24052e97eef0612c486ef4f220f3022dbd15f95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C39 22580 bytes
font_02_sfnt_off00009cb0.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB0 16204 bytes

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