Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e7e3b7fff2f0d3…

MALICIOUS

PDF

43.6 KB Created: 2020-09-17 09:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a94004a6e0d2fb7c0cd674aacbf3a2f SHA-1: d6b9da6e6dbe40de228ac05b681d800550aa4b77 SHA-256: 14e7e3b7fff2f0d3ab81b39b2bb7caac3c8cf90b179223708cfb478122b90550
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to drive traffic to malicious sites. The primary malicious URL identified is https://ttraff.me/wix?keyword=deep+reinforcement+learning+hands-on+lapan+pdf.

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.me/wix?keyword=deep+reinforcement+learning+hands-on+lapan+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9ce02e1e-e4be-4895-9148-dfe2ab2765c3.filesusr.com/ugd/115d6e_c03db44364834f51871d888bfe30545c.pdf?index=true
    • https://61fe5258-5b6e-48cb-bfa3-8b726b63feef.filesusr.com/ugd/4329d7_8bc8212a0238487bad0734678c706824.pdf?index=true
    • https://3ddf059e-e2ea-46c3-9e5b-c3185bc9393d.filesusr.com/ugd/4d400c_e5a7f91da3f84bea9b1675366b0d1c02.pdf?index=true
    • https://dd5ad0d6-08a4-4357-b00b-42a37f30aca6.filesusr.com/ugd/15cd4d_170f22daf633446898ac0c383e40016a.pdf?index=true
    • https://c4f6f8a6-0b67-4408-93d1-1c329b0de6fe.filesusr.com/ugd/694d5d_93bf3972851f459faf69aba75e93df6d.pdf?index=true
    • https://222b7cca-b4ff-4e41-b5c2-3f9b856d3958.filesusr.com/ugd/8ba634_5167566253574528bf8ff7c235da1e86.pdf?index=true
    • https://d013910e-b479-4e70-8c1c-9c11c4f65daa.filesusr.com/ugd/145364_de1843baaf2447e8b2940461c4df2c1d.pdf?index=true
    • https://d3358aea-b3ac-46c3-8597-195ffce10add.filesusr.com/ugd/136d07_6415451f86804e5a926a628fcc11c4ad.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/kafel.pdf
    • https://cdn.shopify.com/s/files/1/0438/4319/0944/files/alcohol_120_free_64_bit.pdf
    • https://5e61840e-aa28-42ef-96a2-36c6efa3d6ce.filesusr.com/ugd/38062a_8497dc38e5fd438ea813b664c29e185a.pdf?index=true
    • https://416f0736-62ed-4699-a98a-8d327b5c5a6e.filesusr.com/ugd/2b25e8_2cbc7f0990df456f810082853ff84d19.pdf?index=true
    • https://1fa56945-4dfb-4ebc-903f-bfa3830245b5.filesusr.com/ugd/e33828_38e3df6fdc724e6994dbd5bcf5ee3589.pdf?index=true
    • 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_off00006a34.bin
525e309b111d3b430ce313aa96e7dfefee6f53c8e3eedec1772a1faa96d4fe12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A34 5600 bytes
font_01_sfnt_off00007d1d.bin
f81860bd2673b3420880edf1b51bad3645f1189686917087e9f7c970093ceba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1D 10568 bytes

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