Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b09c4442314ed44…

MALICIOUS

PDF

35.0 KB Created: 2020-08-10 17:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92039bbb1202bde674e2fbd045b8d708 SHA-1: 55b9396e7d77ff922a548eb5fd442eb541ad3cf8 SHA-256: 2b09c4442314ed44a392d31013168783375da3b0b93bd01eb86c06570edf8229
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but the primary link directs to a known malicious redirector at ttraff.ru. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The embedded text and URLs indicate a lure related to educational materials, likely to trick users into clicking the malicious 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.ru/pify?keyword=cutting+edge+pre+intermediate+workbook+with+key+pdf
    • http://files.mnjeweler.com/uploads/1/3/1/4/131437740/fomurogoxufirofaliz.pdf
    • http://fimuwon.animalprograms.org/uploads/1/3/2/8/132814930/2240246.pdf
    • http://files.colombotourpackages.com/uploads/1/3/1/3/131380343/nowudoseninonogu.pdf
    • http://nalujamel.annhlefevre.com/uploads/1/3/0/8/130813765/521266.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/87973900892.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/veritawubizemeripivumi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/16808086263.pdf
    • https://cdn.shopify.com/s/files/1/0437/9492/3677/files/97212078754.pdf
    • https://cdn.shopify.com/s/files/1/0447/9015/3365/files/inhibidores_de_la_anhidrasa_carbonica_glaucoma.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/fasajufasopegoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6081/files/school_zone_workbooks.pdf
    • https://cdn.shopify.com/s/files/1/0441/1500/1496/files/32148943841.pdf
    • https://cdn.shopify.com/s/files/1/0437/1775/5034/files/curso_apicultor.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/seizure_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0189/6347/files/73478408907.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_off000045e5.bin
a2e27d98794b2e0d22da47062aa017a98dbc8326ad8ed3afab3628ed0f014338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45E5 5548 bytes
font_01_sfnt_off000058ae.bin
fb252ecd329d04cb2bb68d2e38696f232181d1dd8f48efc0563466ae3f6f638c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AE 12736 bytes

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