Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cb2af0ae824b34…

MALICIOUS

PDF

46.5 KB Created: 2020-08-26 20:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb176a57222b1321acfc16dd807cd401 SHA-1: 72c1f482ba2c06110cf15eb64cc87e64eb1c3db3 SHA-256: 43cb2af0ae824b3497d3abf32bf20ccd7dd2fd65f18c31040d24108fdfad7607
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is presented as an 'after school tutoring curriculum'. The document also functions as a link farm, pointing to numerous PDFs hosted on Shopify. The presence of a visible LOLBin command execution instruction suggests potential for further malicious activity, likely involving the redirection to the malicious URL. The primary intent appears to be directing the user to the malicious ttraff.com domain.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.com/pify?keyword=after+school+tutoring+curriculum
    • http://kodat.whcffm.com/uploads/1/3/0/9/130969186/dilolewelok.pdf
    • http://gikebe.woolydogdown.com/uploads/1/3/2/6/132680813/jobales.pdf
    • http://files.cmdg.online/uploads/1/3/1/4/131437087/rovikowoburerim.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/keranejunezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/21507361669.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/zivizolerizuxoroxepiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1863/files/stardew_valley_fishing_guide_by_season.pdf
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/darujodubu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/gilami.pdf
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/wafavapej.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/30599760735.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/benim_hocam_tarih_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/neumonia_en_bovinos.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_off000077ed.bin
699f179cd9434ebc3a12abefd164736849a8d3cae539977961a90552af5ec613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77ED 5076 bytes
font_01_sfnt_off00008906.bin
9761b25e34b8e20f2997f0a0bd4f01f1816dd118685a4f76a280deec485f74e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8906 10668 bytes

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