Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d367987a52356f…

MALICIOUS

PDF

61.0 KB Created: 2020-08-29 19:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc6c92fbb521976117bc8993d386f2f8 SHA-1: a03e06b34b9bdf1c4650467fd903fbe41477fd9e SHA-256: 07d367987a52356fde34e5ce5dff8c8ff9e4bcf42d4248e72da2deb054d1c0ee
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' directly supports this finding. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, suggesting a broad distribution attempt. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link are strong indicators of a phishing or malware delivery attempt.

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/wix?keyword=siyasi+ideolojiler+andrew+heywood+kitapyurdu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/516793_4a60de6ea0ae44609b870b2af4a82153.pdf
    • https://static.usrfiles.com/ugd/b8c837_e43df2f9b04c402e848935d96cd244f6.pdf
    • https://static.usrfiles.com/ugd/de65f7_ea4a38add9b34e578037af1a533a7e0f.pdf
    • https://cdn.shopify.com/s/files/1/0439/1344/5544/files/annual_credit_report_australia.pdf
    • https://cdn.shopify.com/s/files/1/0431/5765/1613/files/45607386951.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/31865277641.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/online_convert_cdr_to_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/2017_tamil_movies_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/87243432620.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35543542817.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78055f4d46e43aabdc759bd590ecc76.pdf
    • https://static.usrfiles.com/ugd/b8c837_46b1b7ad7be048c687227b99183eaa88.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef2e4b5eed7943a1b64542a5945b9da3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d27470ce9b60460db4db6588a0ddc319.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9e6cca9d402468cb8d9920b47403c0b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af65.bin
17d4ee877f3b6cf153f1f5b35005ece39994f94e1a59a9680b4141c8cfcef9b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF65 5484 bytes
font_01_sfnt_off0000c20e.bin
0c44c5530e225cbd952d7237147100c4de48938cad1dc22aabfaac1390bd87b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC20E 11024 bytes

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