Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c4cc0b6e04ab76…

MALICIOUS

PDF

41.7 KB Created: 2020-08-25 07:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8123e6e802fcdcd75d2b8da3a7427ad SHA-1: 5d60e63927b1a16618ceb0b71fcbcef0f82696ef SHA-256: 04c4cc0b6e04ab7694f501200448f2b00a8115c327162fd574e126405d688bd3
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=oxford+dictionary+pdf+file+free', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The presence of numerous Shopify links, while many are benign, contributes to a link farm tactic. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=oxford+dictionary+pdf+file+free
    • http://ruvobe.rangebourne-pets.co.uk/uploads/1/3/1/4/131453960/4217390.pdf
    • http://wifedofe.designauthentic.com/uploads/1/3/0/7/130775961/subagusewozuramis.pdf
    • http://meraf.abclassics.nl/uploads/1/3/1/6/131637814/mawabawumixalisavufu.pdf
    • http://files.hattrick3c.com/uploads/1/3/1/3/131379894/pegaduf_fogadafozo_fivug_mikuxukij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7630/4544/files/balance_sheet_of_reliance_company_2020_18.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/92601814821.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/kundali_bhagya_video_kare.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/42607275108.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/10583760330.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/in_n_out_spread_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/xuvuzexok.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/zujaxapeboxusuri.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/comparison_between_management_and_administration.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.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_off00006654.bin
62832e8c3da22acdb7a23a7d4e89cac96c82983f2ee692662639dfb8841b170e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 5168 bytes
font_01_sfnt_off00007806.bin
d1dd05cabf6af8c8bb32c4a993674475bd2319238beafced3b4418b7bdebda5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7806 9976 bytes