Malicious PDF — malware analysis report

Static analysis result for SHA-256 7105bb55db09bb97…

MALICIOUS

PDF

44.6 KB Created: 2020-08-07 07:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b57f5d09195b1a6f17f921a76b43011d SHA-1: c7ca68d6daae5cbf7b73b14d529f97deb5692f4f SHA-256: 7105bb55db09bb975fa3eb4f53afee9e5adc2be4d4273a21f6a2e99b82467159
154 Risk Score

Malware Insights

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

This PDF document is designed as a link farm, presenting itself as a resource for 'Telugu stories books pdf download'. It contains a large number of embedded links, with at least one leading to a known malicious redirector at ttraff.com. The document's primary function appears to be directing users to potentially harmful external content, masquerading as legitimate resources. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/wb?keyword=telugu%20stories%20books%20pdf%20download
    • http://files.selectricartists.com/uploads/1/3/1/4/131407655/2763129.pdf
    • http://files.kavanaghsport.com/uploads/1/3/0/7/130739202/5256241.pdf
    • http://files.americanbuttercupclub.org/uploads/1/3/0/7/130739968/melubidudone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/acid_rain_causes_and_effects.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/how_to_make_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/2007_honda_odyssey_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/4497/5271/files/auditory_pathway.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/76954293865.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/45100346338.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/rukivelotezoluv.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/80523073774.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/58890254123.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/65845328581.pdf
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/bertrand_russell_problems_of_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2240/files/77682422663.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/74354994675.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/28353970097.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058cc.bin
188a22f014af8a23e1b8e09b0f3482d48529b1c4bd59b09aa0ab5163b00800cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CC 5452 bytes
font_01_sfnt_off00006b7a.bin
c3890f9f039758a9515c895ca22d13c163a4c2da438801a31433f17a9cdf41d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7A 10616 bytes
font_02_sfnt_off00008ff8.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF8 16092 bytes

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