Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddc6c971c830a1b…

MALICIOUS

PDF

45.1 KB Created: 2020-08-07 21:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7cbb39214cee61d2fc1d93600073dfc SHA-1: de3c29ec230499c59251e55d59a969d99d9ec66e SHA-256: 6ddc6c971c830a1b808dda5385c756cfed8ccd73743db8245ec3feedc7b3ecb8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=zaburzenia+psychiczne+dzieci+i+m%25C5%2582odzie%25C5%25BCy+gmitrowicz+pdf', is designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

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=zaburzenia+psychiczne+dzieci+i+m%25C5%2582odzie%25C5%25BCy+gmitrowicz+pdf
    • http://bodujulo.chaplainsweeklythought.net/uploads/1/3/1/4/131407089/bb3dd2e8e487d.pdf
    • http://files.thenerdshelves.com/uploads/1/3/1/3/131397971/dolozopiwuxuba_muzafez_kiterexuvu.pdf
    • http://files.thecraft2draft.com/uploads/1/3/0/9/130969089/73a699.pdf
    • http://tawubi.polarbands.com/uploads/1/3/1/4/131453194/majig-jopapepavala.pdf
    • http://kesaxa.inspiring-tomorrows-leaders.com/uploads/1/3/1/4/131438405/levon_wedatizit_dovadivivapida_mizewunokom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/25924083076.pdf
    • https://cdn.shopify.com/s/files/1/0447/3192/4629/files/bengal_tiger_2015.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/adorno_e_horkheimer.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/52994550269.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/lazex.pdf
    • https://cdn.shopify.com/s/files/1/0440/8036/5720/files/terex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/tajalozakemizivowafojoje.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/buramuloxokuje.pdf
    • https://cdn.shopify.com/s/files/1/0440/5490/4997/files/xekatar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/jaxogokakinedib.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/45418599419.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_off00006c80.bin
2dfcddcd9e0288696270e701148c3d0fc5d21d0ade7fc38b9688740a8806224a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C80 6000 bytes
font_01_sfnt_off000080d3.bin
fcf48208cb67741f3d0d7a2b29452019d03bc472df63737991a1525d1d7cde40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D3 11140 bytes

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