Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc33072b58aeec3c…

MALICIOUS

PDF

39.0 KB Created: 2020-08-22 11:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00aecaeeec145a4bfc91ef096affc289 SHA-1: 7b49311d95d3fac0339428719070f6f275f907fb SHA-256: cc33072b58aeec3ca2851c911443a0592b4b18bb95d35abe2112069a6873f1f5
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains a URL that points to a known malicious redirector. The primary purpose appears to be to lure users into clicking on these links, which likely lead to further malicious content or exploits.

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=atomic+structure+worksheet+answer+key+7th+grade
    • http://dolonobin.d-dcrafts.com/uploads/1/3/1/3/131383483/rawopuxajop.pdf
    • http://files.fourlegsfarm.com/uploads/1/3/0/7/130738562/xefekebo.pdf
    • http://files.outbackatpostoak.com/uploads/1/3/1/3/131384135/mifukimotaselav.pdf
    • http://vuvog.mobileveterinaryimaging.net/uploads/1/3/0/7/130776279/fefiv-wigikedorilupog-sasotafusiseseg-relabamaba.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/nikosatikegoxipaduzuga.pdf
    • https://cdn.shopify.com/s/files/1/0438/4296/1570/files/encyclopedia_britannica_all_volumes.pdf
    • https://cdn.shopify.com/s/files/1/0449/9701/7768/files/ergonomics_in_computer.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6870/files/12_human_body_systems.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/2004_ford_f150_owner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0451/6030/0698/files/macos_preview_add_text_to.pdf
    • https://cdn.shopify.com/s/files/1/0447/9015/3365/files/marketing_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/5467/6645/files/peter_watts_blindsight.pdf
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/23390567446.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/jexori.pdf
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/sajigusudak.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/fanafanezixapig.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_off00005943.bin
add5a365db440f66d33ed4b8c9a5c75232022bdc349270a528414e7d5237099c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5943 5648 bytes
font_01_sfnt_off00006c73.bin
1e9408bcb9a2eaf22ae3badd33fcfc1070de899600883e21eec775f4f2b50f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 9948 bytes

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