Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb49085ff9bea6c…

MALICIOUS

PDF

39.1 KB Created: 2020-08-20 05:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a7c7671a3d7a4a49ca56b0ea35a81a9 SHA-1: 2cae832eab8cba513037e601bd17c8dec031d4a7 SHA-256: 1eb49085ff9bea6c81d20c986a01a83b33620d52298645d54343e3946052ca44
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests the document is designed to serve as a link farm, potentially to obscure the ultimate destination of the malicious payload. The primary malicious URL identified is https://ttraff.ru/pify?keyword=1st+grade+graphing+worksheets, which is flagged as a malicious redirector.

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=1st+grade+graphing+worksheets
    • http://mirigek.gigiaroundtheglobe.com/uploads/1/3/1/3/131383483/nurazodabide.pdf
    • http://files.quiltelements.com/uploads/1/3/0/9/130969801/winekipugil_widakakukefakur_besumutap_vuwokujegew.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/xanesunewanutegojivulifuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/fuvarogalukalujibifosew.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/18912836913.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/argumentative_article_sample.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/derawedajuzenuzoragivuloz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/57340980951.pdf
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/cessna_172_cockpit_layout.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/54333617230.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_off000059cb.bin
6c9a1f2bd945ebbffc2885f9b659da67a1cf50d118551b29aac49c162e062a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CB 5300 bytes
font_01_sfnt_off00006be0.bin
1622c671b784c69f89f496237cee64646add868011d65cf57c8524d1b3706dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE0 10692 bytes

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