Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d24795d706663f…

MALICIOUS

PDF

51.7 KB Created: 2020-08-19 23:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 221fcb5a1eb3d518062a2c6b876433c6 SHA-1: 7b6dcbba95df3f54b4238ceb7b28d73a46cb8ad9 SHA-256: a8d24795d706663f977973ddbf521813088c5b6f65740b16caaa1a50b2f24bba
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lure users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a Facebook app, further supporting the malicious redirector finding. The presence of a remote support tool lure suggests a potential pretext for further compromise or social engineering.

Heuristics 4

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=facebook+app+for+android+4.+2.+2
    • http://files.jambandpurist.com/uploads/1/3/1/8/131856365/76af5249.pdf
    • http://files.elrepco.com/uploads/1/3/2/7/132740214/119545.pdf
    • http://xamogez.katydunlapyoga.com/uploads/1/3/1/3/131397970/3671135.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdf
    • https://cdn.shopify.com/s/files/1/0432/4429/0205/files/evangelios_apocrifos_bac.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/23904075600.pdf
    • https://cdn.shopify.com/s/files/1/0441/2293/1352/files/sifidog.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/alcatraz_prison_guard_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/27061542497.pdf
    • https://cdn.shopify.com/s/files/1/0439/8075/1006/files/practical_magic_book_of_shadows.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/importance_of_amenities_in_tourism.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/kisiwulub.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_off00008c86.bin
d3ffb36ccc33f5255c9a8fe17e8512ab496c42a3e12c5ac38294ab003a317f1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C86 5348 bytes
font_01_sfnt_off00009ed3.bin
84dd59644a46bfc1242e920e58acd99b2ba8814f49c32b706a48761a1bfd8c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED3 10304 bytes

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