Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ac5ec6cc8098f1…

MALICIOUS

PDF

44.4 KB Created: 2020-08-19 01:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f94bb0ba72d08d2085e2b8b5ff783dd SHA-1: 1b6212947c3ac46bf00051ff7b46b9590e590e95 SHA-256: a3ac5ec6cc8098f108b2f510b93a17cbf8ce7751b0fb5b20ac6c87e84bb7280e
120 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 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a reference to 'curriculum vitae format', suggesting a lure. Additionally, a PDF link farm heuristic indicates the presence of numerous external PDF links, with the primary one leading to a Shopify domain. The file is likely a phishing document designed to redirect users to malicious content.

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/pify?keyword=curriculum+vitae+format+in+english
    • http://files.discipleshipacademy.com/uploads/1/3/2/6/132681440/1057888.pdf
    • http://jixixune.elginowl.com/uploads/1/3/1/3/131383775/463861.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/wibagukulozagune.pdf
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/vilipetodiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/wezobifetuxokidozilukopij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/behaviour_modification_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/6432/8345/files/arabian_nights.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/53304036830.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3110/files/pembebanan_cantilever_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/3859/7539/files/94282332437.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/zaviwulovexadalozunixofeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/3944/0543/files/wogadipimavirejekujujaxo.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_off00006fac.bin
ed9227e8f37d841451ab3c9eb53e258cac99aeb78be1b196eca405692d1fd695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAC 5260 bytes
font_01_sfnt_off0000816c.bin
3b16de29a42e4b11ce77fa1ad39a1d1cec067f9307ccf933d3b8123264c91861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816C 10376 bytes

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