Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb697bf7c9c3c25d…

MALICIOUS

PDF

73.2 KB Created: 2020-08-12 05:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35590d2094d7e5f46a0c8365c6601deb SHA-1: a7913f57a03c9e4874f4f6450d19d7d12a684cda SHA-256: fb697bf7c9c3c25d666c4a7a4a4c4e363d0b0fe44e233fb1a89a71fae00fb27d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=apache+tomcat+7+user+guide+pdf'. This suggests the document is designed to funnel users towards malicious sites, likely for phishing or malware distribution. 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.cc/pify?keyword=apache+tomcat+7+user+guide+pdf
    • http://vatob.moonheim.com/uploads/1/3/0/7/130776811/lobabima.pdf
    • http://files.pearlseed.online/uploads/1/3/0/7/130776141/tusori.pdf
    • http://files.carmandalepersians.net/uploads/1/3/0/9/130969300/cea744267b.pdf
    • http://puwiw.mrmtechcenter.com/uploads/1/3/1/6/131637136/rigujeril-lusipotexeb-muxamasozid-jebutavosod.pdf
    • http://files.pinetreechalet.ca/uploads/1/3/1/6/131636654/653e00e.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/93597072520.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/plato_the_apology_of_socrates.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/wade_organic_chemistry_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/lilegamebuxatulexawasopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7423/files/wonijuvopevupiganomufej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/fekexizulibane.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/kupepojutukem.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/41471781868.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/agents_of_shield_season_1_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/linear_equations_and_inequalities_in_one_variable_pdf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c809.bin
f35e5c737357910eb421d636091b8ac6c4ee3cefa85524b43b41b86b8c9a4cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 5380 bytes
font_01_sfnt_off0000da58.bin
e0f1bf19842db79905698de8a6fd874749d6cfee9606f4b968ef3785bfcce4e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 14904 bytes
font_02_sfnt_off0001097a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1097A 4324 bytes

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