Malicious PDF — malware analysis report

Static analysis result for SHA-256 238ee9f2a0c4d265…

MALICIOUS

PDF

44.1 KB Created: 2020-08-24 14:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9f6be6ebe4f57d26df95864385bec62 SHA-1: ecb4b7ce99186c017f76044089a8ed19c87ec6b8 SHA-256: 238ee9f2a0c4d265f4bbaee48aa2bcf6468510bf921cd8e76c453a542068bcd1
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=attestation+versement+formation+rsi, which is also listed as a malicious redirector. This suggests the primary purpose is to lure users to malicious sites.

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.ru/pify?keyword=attestation+versement+formation+rsi
    • http://files.cristenbopp.com/uploads/1/3/0/7/130776208/f3775a.pdf
    • http://sijazu.designsbyshirley.com/uploads/1/3/2/6/132681946/1284353.pdf
    • http://lemajeme.animalcarecenterdanville.com/uploads/1/3/1/4/131438177/6067764.pdf
    • http://files.georgecaldwelljazz.com/uploads/1/3/1/8/131856290/wireposaluziro-wijujepak.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/37811103255.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/91014809482.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/jawinedifit.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/mewiminaxofajodik.pdf
    • https://cdn.shopify.com/s/files/1/0434/9414/6200/files/mifizubima.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/bozazuzetejovotuxokag.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/nekepekamurubu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/california_rental_agreement_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/zojakag.pdf
    • https://cdn.shopify.com/s/files/1/0434/6652/2790/files/fomofowawarimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/oracle_sql_developer_format_code_shortcut.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005952.bin
95fc6499030eeb872e5c2fb322dd01a96f29c9038ae1a76af46bca056e159166		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5952 4932 bytes
font_01_sfnt_off00006a05.bin
9474ae3da04c942bd7fc6bb145402d61963d139cb676c4bcef38b2f31ba773bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A05 10536 bytes
font_02_sfnt_off00008dbd.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBD 16204 bytes

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