Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ddb1b5faf65d16…

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 13:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 726d0d03ba2a24161c5eede962f5700b SHA-1: 87e29041cb0391bf51b2f99992fae49949be6113 SHA-256: 83ddb1b5faf65d16940fccc0bdc314b04b1fe34ac9fc21b6021b4fa6dfdeffc9
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious domain, disguised as a search result for an algebra textbook. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted from this sample.

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/pify?keyword=beginning+algebra+12th+edition+pdf
    • http://files.dockconnectionllc.com/uploads/1/3/1/8/131856757/010efe6123f0.pdf
    • http://files.mycpajason.com/uploads/1/3/0/8/130874012/7226ecc433df.pdf
    • http://files.brendascreations.org/uploads/1/3/0/9/130969053/vodilitim_dizuz.pdf
    • http://files.kimfairbournmusicstudio.com/uploads/1/3/1/4/131454012/pezuf_jupixusagegegif_patigojed_xejedapilepul.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/satidoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/lutitadikulolifibefapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4849/3475/files/toyota_rav4_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/insurance_company_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7959/files/bhikkhu_nanamoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifizazuxapi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/88377422121.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/certified_information_systems_auditor_cisa_cert_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/wukugofavopelodon.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/54189266890.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/kptcl_junior_assistant_previous_year_question_papers.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2709/files/jiramolurizitogakuwaf.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_off00005d66.bin
d3c0bcb7f65b37d9c4434df1474d73532184d238527789bd91d533839cf3b0c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D66 5496 bytes
font_01_sfnt_off00007013.bin
e64d1b072755de5ec3f16eb900315fb19ed8229f176c2aa2fd5cb2f153516c4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7013 10244 bytes

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