Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cc466c35ec46fa…

MALICIOUS

PDF

38.6 KB Created: 2020-09-16 19:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0250b115f0c65a6b45475de4fb704da7 SHA-1: 40caf94bb642a1d1efe83f9d1fd8d87793f7652b SHA-256: 62cc466c35ec46fade288d294680feed1fbf795855aa3442970fd8a84c6190d7
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are part of a link farm designed to host further malicious content. One primary URL, 'https://ttraff.me/wix?keyword=world+history+chapter+30+section+1+assessment+answers', acts as a redirector to this network of malicious PDFs. The ML classifier strongly indicates malicious intent, and the structure suggests a phishing or redirection campaign.

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=world+history+chapter+30+section+1+assessment+answers
    • http://basuzifo.mrscolessupersciencesite.com/uploads/1/3/0/7/130739777/677054.pdf
    • http://bavele.coamexicaneatery.com/uploads/1/3/0/7/130738667/bafofil_fazupurek_nawodejeneri.pdf
    • http://files.paradisekennelnb.ca/uploads/1/3/2/6/132681596/dadujixisawojo_miwaz_digam_megoxape.pdf
    • http://files.umesingapore.org/uploads/1/3/1/4/131453595/16a6ef8.pdf
    • http://zepesexa.pilgrimsailing.com/uploads/1/3/1/4/131437379/bakap.pdf
    • http://pevoxedux.st-michael-school.org/uploads/1/3/0/9/130969742/ec42da47dc4.pdf
    • http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdf
    • http://riziga.lovelocalnashville.com/uploads/1/3/0/9/130969018/3365685.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/7759/1449/files/34697562941.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/xudigil.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/12207331560.pdf
    • https://cdn.shopify.com/s/files/1/0432/6722/7811/files/95469946215.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/71195892565.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_off00004c15.bin
00cb753e980cee84eb35dcff87d4af11fc8e2390541077502274c1c840649462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C15 5668 bytes
font_01_sfnt_off00005f4e.bin
b82375a2eef07b0c8dddac8f52f7ccda92b89d4bdb89f954c9f0cd72d672d3d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4E 9340 bytes
font_02_sfnt_off00007f3c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3C 4324 bytes

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