Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ceafe806f8a3907…

MALICIOUS

PDF

46.0 KB Created: 2020-08-30 23:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdcd8b42cfdd6e2f2aae1b440a78faaa SHA-1: 6b56cfb0b3016d3f8d7f086e8587c8b783c25416 SHA-256: 0ceafe806f8a3907506419b56a9ddb3cd03bc777032fb1a2b2dacf568f514b11
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector, indicating a malicious intent to lead the user to harmful content. The ML classifier also 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.ru/wix?keyword=octagon+picnic+table+plans+metric
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5d2cf3_8454196d63ae4bee99e1a62eb7bd9ad2.pdf
    • https://static.usrfiles.com/ugd/bf650e_ad48cc14cf944a2e94dc04c8d4f147e7.pdf
    • https://static.usrfiles.com/ugd/9e14ca_10ea33b14e8549c69d2ec7644313fdef.pdf
    • https://static.usrfiles.com/ugd/39cb9d_6110a8c190d4485d98f8b7748bde0f76.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419705ab4874e0bac4a3c4176785338.pdf
    • https://cdn.shopify.com/s/files/1/0432/5074/5512/files/tifimafabupazekosewusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/80719850994.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/15117543015.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/38893930653.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/kogujupexabofumew.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/bukolabir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/19750210097.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/34874497846.pdf
    • https://static.usrfiles.com/ugd/95089d_a1861bbb02ba4fef9c571ba17a6f1b81.pdf
    • https://static.usrfiles.com/ugd/6f9b04_054ba5752488412999d8f82e4ef049a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb5060f414fa44a087299213ea30f6b9.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_off00007589.bin
9efa8b8222088798079469aa3789283b9676c1e5a9fa70abbc18e03fd3a8edfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7589 5420 bytes
font_01_sfnt_off000087d3.bin
cfc045722256bbb1bfa8b6a0da8eb188d65afc945b5682806ba1983b1c425e06
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D3 10248 bytes