Malicious PDF — malware analysis report

Static analysis result for SHA-256 54de913c015b6633…

MALICIOUS

PDF

101.7 KB Created: 2020-07-28 02:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 5c986094285e28c6c6677bec3d1cd49f SHA-1: 4b21c48297b1ba9a7f32f067e84efeee04433dc1 SHA-256: 54de913c015b6633238c4a274384696426fd60e92118aaa5eccbf4f26b7cae37
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, a technique often used in SEO link farms to artificially boost search engine rankings or to distribute malicious content. One of the embedded URLs, 'https://ttraff.ru/wb?keyword=septuagint%20bible%20pdf', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, potentially for phishing or malware downloads.

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=septuagint%20bible%20pdf In PDF document text
    • http://files.gordongreggphotography.com/uploads/1/3/0/8/130814121/e83eb247bd970b.pdfIn PDF document text
    • http://files.princessmi.com/uploads/1/3/0/8/130874102/2238965.pdfIn PDF document text
    • http://files.lauracarson.net/uploads/1/3/0/7/130775393/5772275.pdfIn PDF document text
    • http://files.burtenglish.com/uploads/1/3/2/7/132740408/juvevupuges-zememetemajurel-ditemexowabe-wilabebuzaduv.pdfIn PDF document text
    • http://files.jesta-designs.com/uploads/1/3/1/6/131636737/0a6d257415265.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/1/0437/6412/1752/files/41002000187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/lasirizavovopufuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/gijazekosezipitowofow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/27348603361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3112/4385/files/nagojalonok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83759083977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0757/3149/files/fowevasagowalizunologulex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3384/4119/files/52386449663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/36481553984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/63494100532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/nofeluwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.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_off00012b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B28 4948 bytes
SHA-256: 02828bbeb3e2e30faf364605b359cf02ac03e59a206ae7f10d6dccb73682d34c
font_01_sfnt_off00013c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0A 29732 bytes
SHA-256: 5a439bfb5bc12b4945637c11111d99ec44ff260c1902980b38e3bc58ea4a5191

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