Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e398ba30df93e85…

MALICIOUS

PDF

44.3 KB Created: 2020-08-27 20:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8559ddfc675f571a122a2c04fefa12e1 SHA-1: e21ccb986c4e17ee7b5da9ca54030075bc099f04 SHA-256: 7e398ba30df93e85fa1a46226e444dbf10686bd4df2b29dd1805ba48aa2c4aa6
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a heuristic firing indicating a 'PDF SEO Link Farm'. One of the primary links directs to a known malicious redirector service (ttraff.cc), suggesting an attempt to obscure the ultimate malicious destination. The document body itself contains garbled text and a URL that appears to be part of the link farm, further supporting the malicious redirection pattern. No scripts were extracted, but the extensive link farm points to a delivery mechanism designed to lure users to malicious content.

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.cc/pify?keyword=calcium+hydroxyapatite+crystal+formation
    • http://files.thattruthspoken.org/uploads/1/3/1/6/131606260/xekutujelesijobojim.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/expenses_entry_in_tally.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/manuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6673/files/whetstone_sharpening_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/daxabepusigifaginamudixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/busefidesanupo.pdf
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/mba_entrance_test_papers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9279/5801/files/35875539382.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/bundesliga_spielplan_18_19.pdf
    • https://cdn.shopify.com/s/files/1/0435/2960/1175/files/aiag_spc_manual_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6901/files/round_hair_brush_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/mevazo.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_off00006bc2.bin
cbe88ce0dd532967aa43a057555a52c25b3d476c0ef45a0dc496a67ed855fc31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC2 5468 bytes
font_01_sfnt_off00007e42.bin
5b592af576beafdb7c63d1225567435171de364670084145760b7cff040faf7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E42 11180 bytes

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