Malicious PDF — malware analysis report

Static analysis result for SHA-256 14091c343b5c9138…

MALICIOUS

PDF

42.2 KB Created: 2020-08-23 22:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37fcf6b18ef70f2753c5cb6495b25e26 SHA-1: 0f831ebc0ef6e56d0b3118c89b2e52ff4331e300 SHA-256: 14091c343b5c91383ce1694580a335e4033cba6cba3fe5f173e8a4cb308b49a7
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=dental+front+desk+interview+questions+and+answers', suggesting a lure to disguise malicious activity. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to PDFs, potentially for SEO manipulation or to host further malicious content.

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=dental+front+desk+interview+questions+and+answers
    • http://files.nbarmichigan.org/uploads/1/3/2/7/132741241/dujevukife.pdf
    • http://fevixim.junewebsterart.com/uploads/1/3/1/8/131856827/5166129.pdf
    • http://files.aplusephoto.com/uploads/1/3/1/4/131455956/123275d345ecc0.pdf
    • http://files.shaunstournaments.com/uploads/1/3/0/7/130776151/kivosaxaxegaj-geradoba-nupidak-doroxor.pdf
    • http://sanusef.globalrelocationsolutionsinc.com/uploads/1/3/2/6/132681352/legotof_sogow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/corporate_accounting_amalgamation.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6840/files/rearranging_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/python_programs_for_practice.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/jebugiturupuvaxudofog.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/xuxipaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/3809052964.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/58287717033.pdf
    • https://cdn.shopify.com/s/files/1/0437/7329/6789/files/51746902344.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/63532215364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1257/files/1053817131.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_off0000685a.bin
e7456e3af0913036a589030249158e99ad6050d18152764bf8a93d95a6f990d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685A 5244 bytes
font_01_sfnt_off00007a54.bin
c5bd13d24b2c047f5d987fcd77fa7ab0767de69a17d33569bddd89a3d46d1315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A54 9776 bytes

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