Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cca1fa81de3ae02…

MALICIOUS

PDF

39.8 KB Created: 2020-08-06 22:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66b59588cc94db4f692a08e11647d160 SHA-1: 37a89ee44156f96d831cc4c1b07f66799b866284 SHA-256: 7cca1fa81de3ae028896e79a7ccf1799073a2ef41d6149c5686641e60bc51c02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body and embedded links suggest a lure to a link farm, likely for phishing or malware distribution. The presence of embedded links and the ML classifier's high confidence score indicate malicious intent.

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.ru/pify?keyword=yellow+pages+uae+2020+pdf
    • http://files.janlaurengreenfield.com/uploads/1/3/2/6/132695629/satud-fukisugubi-xekinudimodu.pdf
    • http://midewugi.dana-does.com/uploads/1/3/0/7/130775085/1006952.pdf
    • http://files.lmtechnologiesne.com/uploads/1/3/2/7/132740445/1651718.pdf
    • http://files.bucksnortnrunclay.com/uploads/1/3/1/4/131453990/sutupip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/fuvuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/denupunavasejowog.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/pemedibizese.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/pepuxewu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/44371823663.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/fixesazeda.pdf
    • https://cdn.shopify.com/s/files/1/0443/0607/1708/files/convert_web_to_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/bases_de_datos_en_excel.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/94340493981.pdf
    • https://cdn.shopify.com/s/files/1/0437/5481/5640/files/sikugutoloxodaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/xasiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045f3.bin
35554ac81c82595c0a1783a70aa7ca8e6cd9eaaf93d735c555f113ead4a5c654		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45F3 3604 bytes
font_01_sfnt_off000052d2.bin
1d3282d222d8b57f840ecdee4dd4eb70e0ab9f42603bff68e277a98636b7427a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52D2 5088 bytes
font_02_sfnt_off00006442.bin
5d091a0c2eeae61858636d21c24e1d84a67ca2ac98c403eda2e5f8b7b2162125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6442 9280 bytes
font_03_sfnt_off000083d2.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D2 4324 bytes

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