Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51d77a3d0926ab4…

MALICIOUS

PDF

69.6 KB Created: 2020-08-06 14:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91da4460dc20b5ac9cd4ae07c2eb01eb SHA-1: 04fa5595b22729ba0a0d01898529caafcca37abf SHA-256: a51d77a3d0926ab48d4986733905538e7112678718ef7ec5156734710e56dea6
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a link farm heuristic indicates the PDF was likely generated to appear in search results, further supporting a phishing or scamming intent.

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=conformation+of+alkanes+and+cycloalkanes+pdf
    • http://files.holistichealingspa.com/uploads/1/3/1/3/131379040/lipupimuru.pdf
    • http://files.annualreport-m2016.com/uploads/1/3/2/6/132696018/misipasefirefazorude.pdf
    • http://gafusap.douglasbowie.ca/uploads/1/3/2/6/132682989/7694851.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/how_to_write_a_good_readme.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/50873108388.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/55819327787.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/21901003726.pdf
    • https://cdn.shopify.com/s/files/1/0433/7988/4186/files/imdb_barney_s_adventure_bus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/91871205169.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/lupow.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8134/files/b._ed_result_2020_hpu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8999/files/pazedeve.pdf
    • https://cdn.shopify.com/s/files/1/0434/6786/6278/files/cash_loan_agreement_format_in_tamil.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_off0000d296.bin
2d477553f835b2238a77141ede94d0aa4922b53f560b350b5a1b069a062d161e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD296 5372 bytes
font_01_sfnt_off0000e4ca.bin
07d96f1897a79956cc2a587794e378be42995b0e720a7ea8ae24f4920aba931c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CA 10712 bytes

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