Malicious PDF — malware analysis report

Static analysis result for SHA-256 85262af78e1887f9…

MALICIOUS

PDF

33.0 KB Created: 2020-08-25 14:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d60459615b35a51d837eb29e7f7f0b4 SHA-1: a7bec539f4ab3e18dd09a3ce221672aed3c714e0 SHA-256: 85262af78e1887f94d0558001658c2c3169e2fa187c6eb7735635a1089aa4d25
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, indicating a social engineering attempt to direct 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=imperative+sentences+worksheets+grade+2
    • http://zukew.kappa-photography.com/uploads/1/3/2/6/132680813/pefetawagem.pdf
    • http://xibure.jennsartclass.com/uploads/1/3/0/7/130738847/4f00d331.pdf
    • http://files.alwaystrive.com/uploads/1/3/0/9/130969791/rurutarisugezo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5888/6806/files/xixuferozuginomiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/lalito.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/liwunafefoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1882/1530/files/bartleby_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/lifezikifogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fawalonilon.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/building_construction_by_rangwala_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1954/files/44788726678.pdf
    • https://cdn.shopify.com/s/files/1/0440/5490/4997/files/literal_equations_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/9438/3522/files/dts_sound_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0462/4708/4181/files/biwerijigi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bokowolexom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6437/files/vunaxosibu.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_off0000432d.bin
6b85e1ded79eb767d92c678766baa4fb5c500124a5eca11420ece5c8696c8144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x432D 5740 bytes
font_01_sfnt_off00005692.bin
aaf02ab2f0a67cd0fe4e8addeda879e17d65c38f317b7673ad809d3c9ecae3d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5692 9508 bytes

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