Malicious PDF — malware analysis report

Static analysis result for SHA-256 202a9ff3ca0ccafd…

MALICIOUS

PDF

41.8 KB Created: 2020-08-11 13:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05d66fce9677866b7bd4bcd6d614ff37 SHA-1: 7b78ece898c9323ba383af697dab1cc577a8a116 SHA-256: 202a9ff3ca0ccafd49c96e28c3d04727bdf5d4c4c22a1ba53543a2cce955a97f
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body appears to be obfuscated or corrupted, but the presence of numerous external links suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=botany+syllabus+for+ias+pdf
    • http://xoxatul.americanearthsupply.com/uploads/1/3/0/8/130814328/e514a17874d01.pdf
    • http://zagamo.ukrsportsmuseumhof.org/uploads/1/3/1/8/131855997/c736986.pdf
    • http://dazivijeg.rubycopper.vn/uploads/1/3/2/8/132814930/4dec50ed70476.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/my_guitar_shop_exercises_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6335/files/48186556453.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/juvaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3062/files/xutukejekivusuwifiv.pdf
    • https://cdn.shopify.com/s/files/1/0453/9131/5112/files/environment_and_ecology_journal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/rowaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/59065759129.pdf
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/50120154049.pdf
    • https://cdn.shopify.com/s/files/1/0429/4567/5420/files/30870637896.pdf
    • https://cdn.shopify.com/s/files/1/0431/6469/6738/files/demelazepiduviwunaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/xigidibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/rebaguzabak.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/constructivism_in_mathematics_education.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_off00006530.bin
3afe52697e19c36800ca87f4e8027a987b5e6ba35d695e8581fd94ec2462eca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 5324 bytes
font_01_sfnt_off00007758.bin
1fdce1c7fc44165f0491d6e89235348c69d3afab2505b59752e2581cc5847380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 10376 bytes

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