Malicious PDF — malware analysis report

Static analysis result for SHA-256 108204575368f6c4…

MALICIOUS

PDF

43.3 KB Created: 2020-09-29 21:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3e8becf54c6c868fcd1d5f8985f869e7 SHA-1: 2d7ef59c9a5bb1a6f6d88eac0987a39bf347f279 SHA-256: 108204575368f6c4e4cf39e043697829eb6db82d7ab63247ebcaab898592d222
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/strik?keyword=lightroom+shortcuts+pc+pdf In PDF document text
    • http://files.g2barnhunt.com/uploads/1/3/1/8/131871642/subefefikoragir.pdfIn PDF document text
    • http://files.westendvethosp.com/uploads/1/3/0/7/130775245/3026289.pdfIn PDF document text
    • http://files.rileyannsound.com/uploads/1/3/1/6/131637374/tusozag-wudaw-zepajusagid-xinaveba.pdfIn PDF document text
    • http://vuzepo.louiseriley.com/uploads/1/3/2/6/132683014/rinopijifejapib.pdfIn PDF document text
    • http://meruz.johnmraftery.com/uploads/1/3/1/3/131380600/63db5de8a54d18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/7525/7756/files/chess_for_windows_8._1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9885/5837/files/51645541488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/free_graph_paper_template_to_print.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/nudowowamadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/6243/8560/files/negijodopapusajawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9534/9666/files/mozilla_browser_windows_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/64312177037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0298/5637/files/dakiviwexoxubovofidipag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2324/3176/files/lagu_anisa_rahma_adi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8191/5809/files/aritmetik_ortalama_ve_aklk_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/giwapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8990/4021/files/digimon_next_order_ps4_trophy_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A09 5268 bytes
SHA-256: c619d38c68096e3ed5253415cd18cf8ba6a701b8330c06fd1246c61caa9eb0b9
font_01_sfnt_off00007bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD7 10728 bytes
SHA-256: b36819441139730380023274194f1469a64b0e46cbeceba219a919a1b8db2dea

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