Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62ddf600a3f88bd…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 01:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4795d442f891ad979a83bb668a10da7f SHA-1: 7846d3e7bc832297767fe2fe86b254d2c836a4d4 SHA-256: a62ddf600a3f88bd07429b39d83c319555a81dc188a6a898ac7f0951fbee2e0b
120 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, the PDF_SEO_LINK_FARM heuristic reveals a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The primary IOC is the redirector URL, which is likely the entry point for a malicious payload or phishing attempt.

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=bundle+in+android+studio+example
    • http://tefikosuf.terenceyoungnow.com/uploads/1/3/2/7/132741198/6104971.pdf
    • http://files.paulsumich.co.nz/uploads/1/3/1/4/131438758/powevozoza-dajojezizamu-rojukomutigu.pdf
    • http://files.chaminadechoirs.org/uploads/1/3/1/4/131407144/disoren.pdf
    • https://cdn.shopify.com/s/files/1/0459/6691/7792/files/70061641138.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/energia_eolica_en_costa_rica.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/81545034194.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/pijefilusatigesamu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4882/files/tekazomidezujekevisefewuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/60841673145.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7388/files/4391345731.pdf
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/94974493032.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/52008671707.pdf
    • https://cdn.shopify.com/s/files/1/0436/2059/7922/files/kafunagizifetawowidijal.pdf
    • https://cdn.shopify.com/s/files/1/0434/5587/3190/files/68209472611.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_off000071f9.bin
e6f250864dd9093f604e42b2c0ec6b378088375a019864be4a3cadbf8cf4377b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F9 5224 bytes
font_01_sfnt_off000083a2.bin
9b9919ba04fbe17c532dcb16b656ee8f5d070c287edf2590ce80efa1b92eac41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A2 10908 bytes

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