Malicious PDF — malware analysis report

Static analysis result for SHA-256 61acb36d0e25881a…

MALICIOUS

PDF

53.3 KB Created: 2020-07-19 20:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d89b31e095b00a45af6fb1d6495adf56 SHA-1: 95bb9f5b7d25f3b3b2a61d781eaaeda18c4c0c97 SHA-256: 61acb36d0e25881a6aa03dcc01bb92b1296e42f44d8acbfc78067e6603f601ec
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, masquerading as a manual, which redirect to external websites. The primary redirector URL, https://ttraff.ru/wb?keyword=ipega%20pg-9118%20manual, is flagged as malicious. The document's structure and extensive link farm suggest an attempt to drive traffic to potentially malicious or unwanted content, possibly for SEO manipulation or phishing.

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.ru/wb?keyword=ipega%20pg-9118%20manual
    • http://files.drcoachkellipt.com/uploads/1/3/0/8/130874369/a164a616.pdf
    • http://files.bartholomaeusofsalerno.org/uploads/1/3/0/8/130814861/laxajopowa-vubinekifiror-munobobezebovel-bafebokexeta.pdf
    • http://files.hayfieldsecondarychoirs.com/uploads/1/3/1/3/131379280/46438b30b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zanixef.files.wordpress.com/2020/07/54020403442.pdf
    • https://nagivujopig.files.wordpress.com/2020/06/30263739022.pdf
    • https://totunisomavi.files.wordpress.com/2020/07/jabivunawewizixedotu.pdf
    • https://lebafoxefi.files.wordpress.com/2020/07/jodazafabazu.pdf
    • https://lirizokese.files.wordpress.com/2020/06/72833612571.pdf
    • https://safowus.files.wordpress.com/2020/06/wujexiju.pdf
    • https://dogapexajok.files.wordpress.com/2020/07/85006535379.pdf
    • https://bikomipej.files.wordpress.com/2020/06/lunugomukipojuwatalidedu.pdf
    • https://dinugit.files.wordpress.com/2020/07/64842771111.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/gitubex.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/13303135483.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/3339907533.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/batimebirenotowevi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/zurazijujoluwazufa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/rojulamanozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1672/4386/files/76385110163.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/14342948600.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/89363325815.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083d5.bin
ad4102740a70e78248be01b036ac323e1c438ab5b4b677b4bb4c60837474b2b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D5 4880 bytes
font_01_sfnt_off00009455.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9455 1800 bytes
font_02_sfnt_off00009ce2.bin
2dd536ea4a8a41ff57a7ad7f8677eeb0eaac2e2862f4c0dae6a835c22c9cc796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE2 12816 bytes

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