Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7004e159a7b4ed8…

MALICIOUS

PDF

49.6 KB Created: 2020-07-20 22:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 60945814e8ef3c96e7a1559ddbb6d5b8 SHA-1: f0fecdcfa23f48518f7f53094467a7e338978ad0 SHA-256: e7004e159a7b4ed8f29b39e49cce0fc8db1b0c6fcab57feae7c89cd4ca8a8cb5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link at `https://ttraff.cc/wb?keyword=historietas%20mexicanas%20para%20hombres%20pdf` leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes. The document body, though heavily obfuscated, contains metadata related to PDF creation, reinforcing the nature of the file.

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://ttraff.cc/wb?keyword=historietas%20mexicanas%20para%20hombres%20pdf In PDF document text
    • http://files.highlandconservancy.net/uploads/1/3/2/8/132815008/1979298.pdfIn PDF document text
    • http://files.heatherseagraves.com/uploads/1/3/2/3/132302774/nufigidoruz-reverime-mojavo.pdfIn PDF document text
    • http://files.lyndalriley.com/uploads/1/3/0/7/130740118/luzotodapas.pdfIn PDF document text
    • http://files.makeastatementjewelry.com/uploads/1/3/0/9/130969477/kifumejojafabet.pdfIn PDF document text
    • http://files.lakesidelabradors.com/uploads/1/3/1/6/131606046/4538241.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/1/0427/8275/2935/files/89716345612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/vewaxudozigowomoluvasuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/wobudilonelokima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4222/6854/files/viverejires.pdfIn PDF document text
    • https://runokuxuzeni.files.wordpress.com/2020/06/23063529172.pdfIn PDF document text
    • https://nutopogin.files.wordpress.com/2020/07/xumad.pdfIn PDF document text
    • https://zagufebaja.files.wordpress.com/2020/06/kunurunedujadiwukon.pdfIn PDF document text
    • https://jugowaxefij.files.wordpress.com/2020/06/bojokix.pdfIn PDF document text
    • https://jorajeto.files.wordpress.com/2020/07/geralonelezomop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bipifapokuwegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/97862258936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/pikimisoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/34387172355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/36630298392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38608120386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/27235781058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/tubexezowetokegegazutejav.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_off000081fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FD 5320 bytes
SHA-256: 5986dc47c5f9ff478566c2d87d4746e8311d1a8bb5d3bde1488e15a0c6a8c9ec
font_01_sfnt_off000093d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D6 11456 bytes
SHA-256: 9f271135a83880fae8e0134d999260d8aa30e819eb9d782e07f4ebfbffce42ab