Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cb6c1991507d1d…

MALICIOUS

PDF

37.5 KB Created: 2020-08-21 21:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9af66022f701217f79d4c3716d2d0d72 SHA-1: 16799c9784553a7ec646b6b5898c9ef70fd5398b SHA-256: d0cb6c1991507d1d8a21b701acaba4dc64cbf7ef412ed5574db04c737386939a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.com/pify?keyword=rams+injury+report+week+5', is designed to lure the user to a malicious site. The document body, though heavily obfuscated, contains this URL, indicating an attempt to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=rams+injury+report+week+5
    • http://files.texasfashionspot.com/uploads/1/3/2/6/132681985/1f1eecef7f.pdf
    • http://files.tenderlovingcarechildcarecenters.com/uploads/1/3/1/4/131407299/a8d19fd606e2.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/dazojuseditojidunar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/71948118473.pdf
    • https://cdn.shopify.com/s/files/1/0434/7281/4245/files/august_month_current_affairs_2020_bankers_adda.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/antivirus_free_for_windows_7_best.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1018/files/12300673526.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/lisabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/talekofud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/15540481174.pdf
    • https://cdn.shopify.com/s/files/1/0462/3033/9735/files/muzukijemomafebewukeni.pdf
    • https://cdn.shopify.com/s/files/1/0434/2965/8790/files/sibizawasokatup.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/varimuwow.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_off000053ee.bin
214134461a7a760659eadf468b17179dad9c106ee50e855ba28e3b1816e37bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53EE 5400 bytes
font_01_sfnt_off0000665c.bin
ece4d09e543ef0bc5a3c0fa3ef0e9b4d71d577e548b34f882692d3036b5b6108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665C 10392 bytes

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