Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17d0e5f86f2d8e5…

MALICIOUS

PDF

119.5 KB Created: 2020-08-15 01:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 860ee992f2d1a383f842f1fe454b5855 SHA-1: fbebf3fe07588315b1f9fe14949f2168795ccc04 SHA-256: a17d0e5f86f2d8e5101c58e69b931cc6095fdcc28899f406ceec744ce00efcea
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link found in the heuristics. This indicates the primary purpose is to lure the user to a malicious site via a deceptive link.

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.com/wb?keyword=cosatu%20policies%20and%20political%20affiliations%20pdf
    • http://negijat.writtenfromwithin.com/uploads/1/3/2/7/132740214/9050437.pdf
    • http://borulatas.bearspawfair.com/uploads/1/3/0/7/130739720/nelibosonafu_ganusus_pizefolukaf_jusexobavex.pdf
    • http://files.masiuliai.com/uploads/1/3/0/8/130813756/burom.pdf
    • http://files.ohioruralwater.org/uploads/1/3/2/3/132303170/1310225.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/soxikal.pdf
    • https://cdn.shopify.com/s/files/1/0440/7682/6789/files/6699414574.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/dojif.pdf
    • https://cdn.shopify.com/s/files/1/0437/1195/5098/files/integral_calculus_feliciano_and_uy.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/aaos_biceps_tendonitis.pdf
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/60216557355.pdf
    • https://cdn.shopify.com/s/files/1/0437/2866/6785/files/24402623757.pdf
    • https://cdn.shopify.com/s/files/1/0435/6961/0907/files/zinukolag.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/43466299687.pdf
    • https://cdn.shopify.com/s/files/1/0431/6046/9660/files/24617740466.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0946/files/spanish_physical_description_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/quick_study_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/97941951555.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_off00019c16.bin
f97ecf03cbf91dfcbdd517ab42972588e72e92cef696b6bcbe4c783abd515f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C16 4960 bytes
font_01_sfnt_off0001ad0b.bin
7b683f9b65605ab61b039afc8b6608aa3ad7d805401202c7bef3711c2eb3dec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD0B 10304 bytes

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