Malicious PDF — malware analysis report

Static analysis result for SHA-256 071a536474c8f510…

MALICIOUS

PDF

50.1 KB Created: 2020-08-12 08:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c71a1b72a012b22f55bf9f793e7a9df SHA-1: 25288cae91fd7eaa4086dbb2712ce3dded89f2f5 SHA-256: 071a536474c8f5102406628d3b08c35c6d4c26751a01803a82194a8f92955ca7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection attempt. The primary URL, https://ttraff.com/pify?keyword=ejercicios+silaba+tonica+y+atona+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, indicating a likely attempt to drive traffic to malicious infrastructure under the guise of providing PDF 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=ejercicios+silaba+tonica+y+atona+pdf
    • http://gexedesov.amerawan.com/uploads/1/3/1/6/131637016/zalowo-gerolimo-jilakusiz.pdf
    • http://files.huntersvillepres.org/uploads/1/3/1/8/131857390/purumebusofog.pdf
    • http://vawum.destinationlifecoaching.com/uploads/1/3/1/4/131482993/e3410fdc5.pdf
    • http://files.eatyourheartoutsd.com/uploads/1/3/0/8/130874284/wejunifomi.pdf
    • http://files.euroshock-study.eu/uploads/1/3/1/4/131437924/d99307a43654.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/93936966670.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/introduction_to_operations_research_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9447/files/68766872888.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zilifevuzumojewod.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/guzitipisemagilapizib.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/lolaruze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xamunodobesezuwenetubaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/98060317364.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/batunezuvabawiwoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/jaluzuf.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005899.bin
cff359118f7a263017e89a9216c252e6214d4d75c20940ad27d121434a5e2b5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5899 5212 bytes
font_01_sfnt_off00006a61.bin
b935ac94061bd5fdc2471302c01b6391bf762c86ed6fc9db52c25eceb8108f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A61 14408 bytes
font_02_sfnt_off000095b5.bin
f4e0a33b594647fbb296a322b9250dce1064f7d1d5fdf1b61004eb46530ca58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B5 16316 bytes
font_03_sfnt_off0000ab43.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB43 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.