Malicious PDF — malware analysis report

Static analysis result for SHA-256 92019899bc3f9b53…

MALICIOUS

PDF

46.3 KB Created: 2020-07-14 05:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 3c6984405b33bf523ad9be1c3ae4f0aa SHA-1: 8fc4949db36ad5366005a5792e100c0c0e6d050b SHA-256: 92019899bc3f9b5332e04e44bef1316de0d2a3407edef52a94be8090e781c2ba
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external websites. One critical heuristic indicates that the PDF links to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be related to 'international monetary fund objectives pdf', likely a lure to make the links seem legitimate. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=international%20monetary%20fund%20objectives%20pdf In PDF document text
    • http://files.sevensistersprogram.com/uploads/1/3/0/7/130739779/goban.pdfIn PDF document text
    • http://files.mmzurita.com/uploads/1/3/0/8/130874518/jibafiwe_gowepiwape_fasukomovu_toxitogulugizuw.pdfIn PDF document text
    • http://files.carolynlaine.com/uploads/1/3/0/8/130874122/ce14bfc0899.pdfIn PDF document text
    • http://files.azureprops.net/uploads/1/3/2/7/132710689/3276341.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/1/0428/9301/7247/files/xediz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/48538977134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/72201903518.pdfIn PDF document text
    • https://miteduxom.files.wordpress.com/2020/07/58469886356.pdfIn PDF document text
    • https://fijurabowo.files.wordpress.com/2020/07/99660803039.pdfIn PDF document text
    • https://xifoburufo.files.wordpress.com/2020/07/punen.pdfIn PDF document text
    • https://bovelabo.files.wordpress.com/2020/07/89071659185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/61661183262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/42025893121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soparuvuridove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/62711988944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/83322403507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/22018918058.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C7 5500 bytes
SHA-256: 4d343567404fcf383f76e9fe3bfc304c798b25cc6cd75eb487553b52dc99b707
font_01_sfnt_off00008964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8964 9992 bytes
SHA-256: e1252ffae683d11b89bebad84a09ea5095581e97dd3653573f2348385180121f

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