Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba00a6fabc9ff228…

MALICIOUS

PDF

56.1 KB Created: 2020-08-20 05:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 130bfa8d26192dd91293b9ce91ee5134 SHA-1: 28cd6af5893e56f78cd5fb7e14484d6e5bf934b5 SHA-256: ba00a6fabc9ff22899f53f2838b1712d8329977dc53e9f3afdf470e8e85ecbef
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=audition+next+level++guide'. The document body, though heavily obfuscated, also contains this URL, suggesting the intent is to redirect the user to malicious content. The ML classifier strongly supports the malicious verdict.

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=audition+next+level++guide
    • http://mebetajim.bluethunderbirdwoman.com/uploads/1/3/0/7/130739892/ruwetezare.pdf
    • http://files.loisbrezinskiartworks.com/uploads/1/3/1/4/131453214/b7cfb65d9d16e.pdf
    • http://desupigu.retroca.com/uploads/1/3/0/7/130739892/7854976.pdf
    • http://files.chehandbells.org/uploads/1/3/0/8/130874429/salimemupepukevoxof.pdf
    • http://files.fordservoboretransmissionfixsolution.com/uploads/1/3/2/6/132682303/7348453.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/43488853230.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5798/files/12684234917.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/kogujupexabofumew.pdf
    • https://cdn.shopify.com/s/files/1/0437/3030/5175/files/lixuwikuxumideduku.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/jiwodekipetedefaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/1245/4560/files/bovediwosagivelot.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/departmental_accounting_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6394/files/physical_development_during_adolescence.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/musijatoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/rebanikalomenu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/woxebixiradaxa.pdf
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/xamarawililaf.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d54.bin
6ea77e624d65ccae75f10fe2de15a82148442e5c377597cef98bac335f2f2c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D54 4624 bytes
font_01_sfnt_off0000ad2c.bin
3aeb9647b0e5375f7196ab05c266241706f38a2f43dbd696de33c1c2a227a39f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2C 11532 bytes

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