Malicious PDF — malware analysis report

Static analysis result for SHA-256 b614abf383cb8b65…

MALICIOUS

PDF

40.6 KB Created: 2020-08-02 23:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99853a479f081c5690d047b9baefc0dc SHA-1: 997e8ae0a64a4c2b2a57c05e9893fc813462a5d4 SHA-256: b614abf383cb8b65f230c8d6bab7f53a3aa1be7dae8a0c4e31c37392125b78b9
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection tactic. The presence of a 'download button' lure further supports the attack pattern. The primary malicious URL identified is ttraff.ru, which is used to redirect the user. While many Shopify URLs are present, they appear to be part of a link farm and are mostly confirmed benign.

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=visual+boy+advance+roms
    • http://files.radcommorgchart.com/uploads/1/3/2/6/132681690/ziwur.pdf
    • http://files.thecurrencymatrix.com/uploads/1/3/1/4/131406507/7090686.pdf
    • http://files.steeplechasehomes.com/uploads/1/3/1/4/131453348/5119854.pdf
    • http://files.casaesperanzalongmont.org/uploads/1/3/1/4/131436981/nupod.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/jovubuwalogadutatepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/15072397137.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/dovem.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/second_chance_shinedown_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/tiwun.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/45919854228.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/72866363379.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/56837535514.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.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_off000061e8.bin
452d581effac08249e549a984637c83a78d8d85a4866c1de3a0d46572d0458d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E8 5352 bytes
font_01_sfnt_off0000740e.bin
6b14672181cc5590d15f8669898b6c3cd9ea813aa03c377e2eac229396c46d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740E 9900 bytes

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