Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a55f398313736f2…

MALICIOUS

PDF

43.7 KB Created: 2020-09-01 02:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 900fa449934fd63b838e91b56ba474fb SHA-1: 26daeda52576d19f9d0f72d874f6d3d6f8312fa7 SHA-256: 9a55f398313736f2eaf03a2eb0f38c02c83bbaa82350ebcbde8d5a1545eba028
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure the user to malicious infrastructure under the guise of providing information.

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=lumbar+spine+imaging+guidelines
    • https://static.usrfiles.com/ugd/b47706_ef5e80fe2fea479a87bc6b0253f0d22f.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_9ed063eefe864d56bc285c922921d6b2.pdf
    • https://static.usrfiles.com/ugd/625844_a7fb68672c7d4e718c24770b65263260.pdf
    • https://static.usrfiles.com/ugd/b8c837_200f101cabbe4a129bb2dcbd3e110874.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/63189408368.pdf
    • https://cdn.shopify.com/s/files/1/0431/5499/7402/files/56902175435.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1863/files/wedomigiwusiwovuk.pdf
    • https://cdn.shopify.com/s/files/1/0454/7041/7046/files/19576313052.pdf
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/mercruiser_3._0_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/mein_tenu_samjhawa_ki_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/72548584752.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/xisogutuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5353/0782/files/vobaforavuwofo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1130/8696/files/bapizisijajuwejegugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/rewidujomodudi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/jusafavupagekaxopemufe.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/79934476453.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/fovudakalexogur.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_off00006c6e.bin
9afccb6e6eae3941ca1b5bfed1906e5cd80530a036bd30e810ca56d23b06824f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6E 5360 bytes
font_01_sfnt_off00007e89.bin
734d3d488552fbcbd744557c5c1bfd29cd2228518dbc4d5bbbddad74698b1ca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 10420 bytes

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