Malicious PDF — malware analysis report

Static analysis result for SHA-256 770bb95f2ef6f916…

MALICIOUS

PDF

38.5 KB Created: 2020-08-09 04:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c9449440d5e9d33f9da56cd0c85149b SHA-1: d85138b36ec3455250b8be52d429a53cd150b11b SHA-256: 770bb95f2ef6f9168b8d79640fc1f644e61db4fd8223f68fc7759b4ff65d5c4f
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating an attempt to lead users to malicious content. The document body, though heavily obfuscated, contains text suggesting a lure related to an 'Oriflame catalogue download'. The presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly suggest this document is designed to redirect users to potentially harmful sites.

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.com/pify?keyword=oriflame+catalogue+august+2020+pdf+download
    • http://files.larrysbuffet.com/uploads/1/3/0/8/130874567/9943173.pdf
    • http://files.dogologyct.com/uploads/1/3/0/8/130874180/xeparanidili_kaliwuxagibi_daxer.pdf
    • http://files.kimberlyenglish.com/uploads/1/3/1/4/131453174/kalulubalaguw.pdf
    • http://files.chambersjewelry.com/uploads/1/3/1/3/131384468/6661602.pdf
    • http://files.brickchurchstjames.org/uploads/1/3/1/1/131163666/delura.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/jatomigajuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/88029063245.pdf
    • https://cdn.shopify.com/s/files/1/0440/2262/8502/files/vusenap.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/tipedurakizafavogamud.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/90810891410.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/26495392392.pdf
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/calendario_sep_2020_y_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/5720/1820/files/8872821440.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/kejijulorasipenodin.pdf
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/futedutela.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/navamobimoxogaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/40289799416.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7142/files/dafipuzane.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005635.bin
da9651124604f0b9fc46b407ba6a2efb6473c2e7befceb1a5775209db654f152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5635 5868 bytes
font_01_sfnt_off00006a24.bin
a2af55851bcff76c9b8e0b65ebd33df51f94bf68d5e763bc586030dbf928999a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A24 10028 bytes

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