Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c2808a45ca28e4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-15 02:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c5b1c5c770ac0b088e25657fe2a4933 SHA-1: 65e238fda79349a6c38559170aba3471bcc24266 SHA-256: 62c2808a45ca28e4df9d158ce7b9e1429631e6c0cec1bb85273c52cc5ecb3838
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 PDF files, suggesting a link farm or SEO manipulation tactic. One primary URL, https://ttraff.com/wb?keyword=list%20of%20irregular%20nouns%20plural%20and%20singular%20pdf, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful 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/wb?keyword=list%20of%20irregular%20nouns%20plural%20and%20singular%20pdf
    • http://files.moreecatholicchurch.org/uploads/1/3/1/4/131408537/dc5b8fcb34.pdf
    • http://files.temenosjournal.com/uploads/1/3/1/8/131871907/2249632.pdf
    • http://files.bremertonfoodline.org/uploads/1/3/2/6/132682806/1ecdd7df706b4.pdf
    • http://files.charmcitycrusaders.com/uploads/1/3/1/3/131383426/korotato-zasuvirab-worupiwaba-mozumav.pdf
    • http://baxuna.scottpruysers.com/uploads/1/3/0/8/130874493/6057321.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/8056/3350/files/59829520254.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9551/files/46480942652.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/60281947357.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0245/files/16561612231.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/33393093351.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/bamomel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rofimoluxita.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/15209624137.pdf
    • https://cdn.shopify.com/s/files/1/0436/7525/4937/files/adobe_reader_for_pc_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9894/files/adverbios_de_grado_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/bloodborne_dungeon_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/57570160435.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000668e.bin
e7eaceb59f7923ca0ddefcb470960c00512758f0abad7b7e44d4dcacfd915b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668E 5152 bytes
font_01_sfnt_off0000781f.bin
364a13b7f186706f07b6119b8053b3c5260b8031b50b44e86ab774c8c6f0a372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781F 10184 bytes

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