Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a645efe0d5bbd6…

MALICIOUS

PDF

70.1 KB Created: 2020-08-29 04:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77bdd136e7aa4b4d7e4101e7c2e67a00 SHA-1: 4f186fd4e7a75c84bf92f0d8235eae3910b09424 SHA-256: 59a645efe0d5bbd6c7f29b79617e098c47b9e346edf81c11353ee91fa9b23f92
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as a malicious redirector, containing a link to 'ttraff.ru'. This URL is likely part of a chain designed to lead users to malicious content. The document body, though heavily obfuscated, also contains this URL. The presence of numerous other links to Shopify domains suggests a link farm or SEO poisoning tactic to disguise the malicious redirect.

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/wix?keyword=superstar+bts+qu%25C3%25A9+es+un+beatmap
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/veterinary_antibiotics_classification.pdf
    • https://cdn.shopify.com/s/files/1/0438/1330/6530/files/cultural_care_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1448/files/grade_2_math_fraction_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/40828242861.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/39721459348.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/pes_anserine_bursitis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1103/files/xivojijisabefitamelumax.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/65534766123.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/zebosimowir.pdf
    • https://cdn.shopify.com/s/files/1/0464/9854/5822/files/72055809091.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/pifanusimasiruxilaviw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/gesomeditom.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d54.bin
cb2234e37e8eeec2bb4ee06d289cb5e2928f9569b623a3ed68ab05e907b2c6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D54 3072 bytes
font_01_sfnt_off0000a854.bin
1ec6028c62e4afc02b72bb92f614e2f03d1fe5921ed14bf43f2bb207f7291892		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA854 5444 bytes
font_02_sfnt_off0000ba7b.bin
6e1be855eb10faffeb4ab35047c4e2aa6e309c0105ccce23722a4574eeca1e3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7B 14568 bytes
font_03_sfnt_off0000e8db.bin
153daf9f0ae120e754a3f753b008eef780ac6717c5accab68914cbe6f1722e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DB 19824 bytes

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