Malicious PDF — malware analysis report

Static analysis result for SHA-256 179e6d3fb56d1632…

MALICIOUS

PDF

52.5 KB Created: 2020-09-03 03:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d50fc4164d5bcf09432e430927bf5b1 SHA-1: e230fb7ea0e65e0695a77598d40ec1497e517441 SHA-256: 179e6d3fb56d16325b92b671ad1578c71446cdf79bfbde954993a99e79f97f60
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 heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=desmos+graphing+calculator+app+free, suggesting a lure for users interested in graphing calculators. The PDF also hosts a large number of external PDF links, likely for SEO manipulation or to distribute 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/wix?keyword=desmos+graphing+calculator+app+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/db1da1_39e6406a96d0440d9bac37e2b044dabc.pdf
    • https://static.usrfiles.com/ugd/b8c837_03c0f31937d141bfbe664aea726c2791.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c4124c12b6e44ecb468ccb43e47b410.pdf
    • https://static.usrfiles.com/ugd/73c254_2b20ab7ba4f5410986aea21a9423a063.pdf
    • https://static.usrfiles.com/ugd/8b49c6_e3d197652cb040019b9396e464ac496b.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/totipamutoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/xelisolodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/kusaxebanixomilasuwuvaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/caravaneer_2_starting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0557/4309/files/telapulugaxadija.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1329/files/kudometunapaxaje.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/2015_chevrolet_impala_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/gmade_komodo_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/39832939753.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52876055892.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/zebegikalovapixitofi.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/rijexirutegolidesixo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/jebukeb.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_off00006bca.bin
09479eccaf4f25d3738f6889a29bd7e99726468cc3d53ca903d5f2007305e87b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCA 5308 bytes
font_01_sfnt_off00007dba.bin
078e02104a9171a42dde79400d1db05c629c244c781de067a9d8a465670d472e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBA 10376 bytes
font_02_sfnt_off0000a179.bin
3210a33707ceda52ebe29b2623009cfb3b3d6b073d103cc6b07a85effab26d5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA179 16060 bytes
font_03_sfnt_off0000b609.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB609 4324 bytes

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