Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8b5df19d38196d…

MALICIOUS

PDF

43.0 KB Created: 2020-08-20 20:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17511a4022e3074ab16f90912efc352d SHA-1: 476416b2f6eff531ebb47aca2845b95d9225dadc SHA-256: 4f8b5df19d38196de24a29ce9702e0379ef9f913983672d22c85ec2b405ca3b2
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=reference+works+homeopathic+software+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are hosted on Shopify. The document body, though heavily obfuscated, also contains the malicious URL. The presence of a download button lure further supports a malicious intent, likely to redirect users to a phishing page or download further malware.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=reference+works+homeopathic+software+free
    • http://files.moreministries.info/uploads/1/3/1/8/131856163/621be9d19e3b.pdf
    • http://tefof.buttercupbakerymb.com/uploads/1/3/1/4/131406202/rosivome_ginekabadasevog.pdf
    • http://files.bobdgorman.net/uploads/1/3/1/4/131452838/1b38a2a7d18d.pdf
    • http://dopiri.castlebargreenhomes.com/uploads/1/3/0/7/130776499/8316495.pdf
    • http://files.lesherosfourbus.com/uploads/1/3/0/8/130813796/loxezuluj_rufegiluli_jifipejofiropu_jefoxurire.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/15291881232.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/jajogeriruj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/referencias_bibliograficas_apa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/tazakugigirivaziset.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/brief_cognitive_assessment_tool_for_schizophrenia_b_cats.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7456/files/12687087308.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/blanqueamiento_dental_interno.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/alchemy_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/broadcast_journalism_andrew_boyd.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_off00006a23.bin
c996a8b2b488158401e97cf5db07a4028e79f0871c59f160b2b8ec093c62e997
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A23 5388 bytes
font_01_sfnt_off00007c5b.bin
e6dd1ddda985bd5bde254e9cdd35e6fc3439e64d436549e84dfc26f5a699b4c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 10148 bytes