Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee70b547da6291c…

MALICIOUS

PDF

42.1 KB Created: 2020-10-11 19:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b73961b5f2cd2b082df7fb20821f23a5 SHA-1: 95980c234e68e0e5d3d645de616e79a8ae9bfc78 SHA-256: 4ee70b547da6291cc0245e3a18e41364e24f88ce7eac080f34bdd7581b895e08
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'https://cctraff.ru/pify?keyword=as400+manuale+italiano+pdf'. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution. The presence of many Shopify links indicates a link farm used to obscure the true destination or for SEO manipulation. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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://cctraff.ru/pify?keyword=as400+manuale+italiano+pdf In PDF document text
    • https://site-1038367.mozfiles.com/files/1038367/bujax.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/jogafivi.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/96503890139.pdfIn PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/jodejigepilarebubapumov.pdfIn PDF document text
    • https://site-1039893.mozfiles.com/files/1039893/40382985503.pdfIn PDF document text
    • https://site-1043651.mozfiles.com/files/1043651/tuneg.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/1/0438/4030/7362/files/62514455962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8759/6187/files/40054112840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/71936139045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3107/2415/files/where_is_area_code_901_in_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/i_messages_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0337/8336/files/95733398115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7057/7045/files/2601372044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/jufalebuxowidoparuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/diablo_2_sorceress_skill_guide.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_off00006444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6444 5308 bytes
SHA-256: c62fa52c98a24a216708174f69a128896fc57b22956fb3f7197b7dd6697da38c
font_01_sfnt_off00007644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7644 11632 bytes
SHA-256: ccf9ae9ed504b3962fc9443af4d71b1b2599155772b65137749a07756f1e355b

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