Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd8952233203f6d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-16 16:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5022764409c59d0cb9c096e3cd8912d SHA-1: 512c2ecaf63c91e7b560654fcb4643ac29082de0 SHA-256: 3cd8952233203f6d7e9bf1acb5300db34babe40bbf2a767304391c89a21e7a64
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, mentions 'Filing form i- 485 checklist', suggesting a lure to trick users into clicking the malicious link. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=filing+form+i-+485+checklist
    • http://gebani.buildmenard.com/uploads/1/3/2/8/132814930/rosovutaguw.pdf
    • http://files.natasharemi.com/uploads/1/3/1/3/131382274/ad30ded.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4630/files/66304313916.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/battle_royale_japanese_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/limezoxuravevudepejav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/21331846861.pdf
    • https://cdn.shopify.com/s/files/1/0440/3822/6085/files/loneliness_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0429/9168/1699/files/66004986478.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/gifoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/the_conquest_of_alexander_the_great_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/23417388955.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/list_of_english_words_with_meaning.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a66.bin
d6663b58dec9b711b563c798f04716981b2c869dde10905320ce6ac184659d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 5540 bytes
font_01_sfnt_off00007d27.bin
f55a3caaf211c57ec64c6a9f3baaaa99715995a35f1cf4471d93fc71546c20f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D27 10564 bytes

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