Malicious PDF — malware analysis report

Static analysis result for SHA-256 205e4e0d97c04f1f…

MALICIOUS

PDF

72.1 KB Created: 2020-08-10 00:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 235ad66a1bba0b7a89e53c0dc3b373dd SHA-1: 2eddec68643c151bf6bccebe59951b393edef4bc SHA-256: 205e4e0d97c04f1f3814c02e0b94a328b29a91f183bfc9f7bd54d8affd54db26
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=black+body+radiation+definition+pdf'. Additionally, it features a PDF link farm heuristic, suggesting it's part of a larger SEO manipulation scheme. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=black+body+radiation+definition+pdf
    • http://files.canyonwindfineart.com/uploads/1/3/0/7/130739919/gedesamagigud_sumitemow_padabejip.pdf
    • http://files.thsbaseballdugoutclub.org/uploads/1/3/1/6/131606526/7d9b7aa0e9eaf6d.pdf
    • http://files.awryministries.org/uploads/1/3/1/3/131383283/721c66eabe4312.pdf
    • http://fuxamef.arrldakota.org/uploads/1/3/0/8/130874655/d17dbf574cadf.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/wright_mills_sociological_imagination.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/mopolotobenir.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/76586337944.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/xakofit.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/zonixukoloxivewilomuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/buduwurajabewom.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/dragon_s_dogma_moonbeam_gem_doors.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/1158681589.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/sapitowivuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/bipufigukatez.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/judevem.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/sapawozi.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_off0000b06d.bin
8440dd78ccec8299124445c545a76632807aa0840e0fe748f3c80d74f02c7dce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB06D 5116 bytes
font_01_sfnt_off0000c1d9.bin
0c30637964417d732e03eb1533d1218bee43fd1e3e77321311a75107dcb14997		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D9 13816 bytes
font_02_sfnt_off0000ede6.bin
6bc0bded15e1533fd20b8803677197f18b49183b8e714809341b5151e399a600		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 16512 bytes
font_03_sfnt_off0001045b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1045B 4324 bytes

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