Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b951b911b75354…

MALICIOUS

PDF

35.7 KB Created: 2020-08-19 15:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6286357e8ead8748a512bd63983fba45 SHA-1: 5d9a948188d9726f4e9a63f367f017d977a4b20f SHA-256: a2b951b911b7535417d2c67b6e251c54c614523b9fe6d5cc04de1430aeaf7fb7
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, but one critical link to `https://ttraff.ru/pify?keyword=angles+of+polygons+worksheet+answers+6-+1`. This redirector is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Angles of polygons worksheet answers', suggesting a lure to disguise the malicious intent. 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.ru/pify?keyword=angles+of+polygons+worksheet+answers+6-+1
    • http://files.barbarafragogna.com/uploads/1/3/0/9/130969624/tikexelike.pdf
    • http://xejix.nsi4africa.com/uploads/1/3/1/4/131483337/6775646.pdf
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/automatic_bottle_filling_machine_project.pdf
    • https://cdn.shopify.com/s/files/1/0429/6530/3455/files/vadev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/10904189232.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/41644304961.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/bolewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/70534379761.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/boniwetokovelowivut.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/peropa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/32366694353.pdf
    • https://cdn.shopify.com/s/files/1/0436/9167/1705/files/jenenakuleguvijitakuju.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/38163277440.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_off00004be4.bin
92eceb5f80b9341e1b69936f77203bf8569a34207bf2270d9cd671e3b50912d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE4 5648 bytes
font_01_sfnt_off00005f45.bin
1360a2edbd9994f8888bb7320d7fea5ceac4635730c5762b6f417e52b1ba06a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 10148 bytes

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