Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dfa045b5572947…

MALICIOUS

PDF

53.4 KB Created: 2020-08-31 11:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e649262d62f9199c3a3da758407ab60c SHA-1: c3cabe89a7d4a01e490bfb5177af28b6c3cb20ee SHA-256: 32dfa045b557294750c9ccc2f8feaa66c02cc1242ce83f36a2d87cd19aa9a08b
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.club/wix?keyword=devious+devices+integration+se', points to known malicious redirector infrastructure. The presence of a large number of external links, many pointing to PDFs hosted on various domains, suggests a coordinated effort to distribute malicious content or conduct phishing operations. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=devious+devices+integration+se
    • https://static.usrfiles.com/ugd/cc14e4_3b4390cd1edc4d219f0c1967d7925437.pdf
    • https://static.usrfiles.com/ugd/6203b9_caf5f7bd7d5d4648b6202c8a53f540c5.pdf
    • https://static.usrfiles.com/ugd/921909_380db4bdabe84629a136da4d4b7f2cfb.pdf
    • https://static.usrfiles.com/ugd/d5cf39_1f351357fd484834b5c5e260837614ff.pdf
    • https://static.usrfiles.com/ugd/6924eb_f8ac3f12dab9410c88d69e19778d9822.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/chris_kraus_aliens_and_anorexia.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/79062222041.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/zowafazagudatevisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1630/6344/files/39729284052.pdf
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/90327548384.pdf
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/jenoputivu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/18729122756.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/wajapipipexo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/tabafizawedoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/wivofev.pdf
    • https://cdn.shopify.com/s/files/1/0434/0301/8392/files/rasozamujarizetedasewejuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2843/files/escala_de_balthazar_pancreatitis.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/68697547178.pdf
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/a_guide_for_health_promotion_practice_1997.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/51165839099.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_off00007b7f.bin
9446db84ef512ccfccb2f8ada1b70d408195adf6b33411a92e909bf817050991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7F 5016 bytes
font_01_sfnt_off00008c9e.bin
c1ac9640a41f475facb80d6812a0c27cf13bad7f059764be68848579cfc39f0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9E 14776 bytes
font_02_sfnt_off0000ba3e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3E 4324 bytes

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