Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9b456ae0298d93…

MALICIOUS

PDF

39.0 KB Created: 2020-08-13 01:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b281c937e9c0b884eb3b64bb059cfb3 SHA-1: 3bf9778c6d21309bc76ee636bec083aa9754f5a8 SHA-256: 0f9b456ae0298d939d8038694be3041f12fe71aa2fa3410e4c6784916a0461c9
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. The primary malicious indicator is the link to 'ttraff.ru', identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lure 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.ru/pify?keyword=d+d+expert+set+1981+pdf
    • http://files.randallhenning.com/uploads/1/3/2/6/132682040/gedipo-vitomedor-robage-tigekozegafezo.pdf
    • http://files.greatexpectationsknoxville.com/uploads/1/3/0/8/130874361/7872f5.pdf
    • http://nabuzama.cappatagglens.com/uploads/1/3/1/0/131069860/remesuruv-rakoret-filevovetofon-fuwumixu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/jipafafixulugona.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/nokikazufulerox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/molokiwofabuxutezisoju.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/76395478159.pdf
    • https://cdn.shopify.com/s/files/1/0439/4123/2795/files/97398498767.pdf
    • https://cdn.shopify.com/s/files/1/0437/4528/0161/files/academic_writing_answer_key_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/pdf_to_word_converter_download_free_full_version_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/the_aryavarta_chronicles_kaurava_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/67632713336.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/58221348903.pdf
    • https://cdn.shopify.com/s/files/1/0435/1832/8991/files/memedoles.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8504/files/86537672080.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/tendinitis_aquiliana.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_off000059ff.bin
4bddfcc7d8df39b2fee79647d12855f45a6d20d60d34ee74a559cbcfb267a921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FF 5260 bytes
font_01_sfnt_off00006c0b.bin
aa561849ece28b8ec07419c3760884533cee157e6fbcb298a243cd4dfc22c681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0B 10296 bytes

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