Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c673b85a14d382…

MALICIOUS

PDF

42.7 KB Created: 2020-09-01 22:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 331a6b7a088b018b25c7166d0cd292d0 SHA-1: 38d591f6206003924c8d0890f4898720c2712bbc SHA-256: 02c673b85a14d3827f11b486ce950f4c83900f6c2b91bdb8ab23fd0ef3aab0f5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as trivia questions. The document also contains a large number of links to external PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs further supports this.

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.cc/wix?keyword=grunge+music+trivia+questions+and+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_a90dd225c32e41e8af431106ff17fda3.pdf
    • https://static.usrfiles.com/ugd/1849a1_16da51e6bbde40ab900067cad6caeaa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0191fed4c6694627b408347a747e0065.pdf
    • https://static.usrfiles.com/ugd/a48928_59e4c77496854528906791b1ee6d0b4b.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/kebebutarelamopusotuzeko.pdf
    • https://cdn.shopify.com/s/files/1/0439/5037/5070/files/there_are_more_questions_than_answers_words.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5084/files/dipoketaxuwotuvoguzip.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/beiersdorf_karriereportal_login.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/86345576434.pdf
    • https://static.usrfiles.com/ugd/6116da_4ac89474717246c583b47b66956ab615.pdf
    • https://static.usrfiles.com/ugd/227d0f_a93663df95834c91b2ac063e28dd8560.pdf
    • https://static.usrfiles.com/ugd/b8c837_575eeb01167d49938156ad861ba7b5be.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bf2a377745d4bbfa8497477ba07b7ce.pdf
    • https://static.usrfiles.com/ugd/e32576_7ba964fa2f9244f5a49b777e85aafef9.pdf
    • https://static.usrfiles.com/ugd/529dbf_09cdf28c4da640f59b3c2fc2805765d4.pdf
    • https://static.usrfiles.com/ugd/efb3f0_29608ab64653498ab02162cbf40baba0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a0a.bin
66217239d3207e45cb942cc5f24fa7b81d83b7c0eea63b8b4f59fe848578f0c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0A 5416 bytes
font_01_sfnt_off00006c6c.bin
54d4049796f5ca12560de6cf9e612f7bfae9cedaf83c2015c698801346aee58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6C 10240 bytes
font_02_sfnt_off00008f45.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F45 4324 bytes

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