Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad89de230dcdfc8…

MALICIOUS

PDF

77.9 KB Created: 2020-08-10 12:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18d21bf87c17db619ede87f5115cdeaa SHA-1: ce1a1ba280d9317447d249059877c54f87a034b8 SHA-256: 1ad89de230dcdfc8ba5c960ea106288f17628351a729825da9a4c5d1d3df63c4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a direct link to a known malicious redirector, ttraff.com, which is disguised with a keyword relevant to the document's apparent content. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation or to spread malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the redirection to the malicious URL.

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/pify?keyword=brahmacharya+pdf+in+telugu
    • http://dojiju.christyokeeffe.com/uploads/1/3/1/4/131407668/92d3a.pdf
    • http://zufako.lot514.com/uploads/1/3/0/8/130814328/6741276.pdf
    • http://files.donamarafriedman.com/uploads/1/3/1/4/131437666/1009463.pdf
    • http://files.lifechurchaz.net/uploads/1/3/0/7/130740175/zefibifiz-refufovug-rijol-masegi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/42885725808.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/57031642785.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/93045544702.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/28848559248.pdf
    • https://cdn.shopify.com/s/files/1/0428/0025/1036/files/ketones.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/grand_theft_minecart_ip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/adjectifs_possessifs_exercices_franais.pdf
    • https://cdn.shopify.com/s/files/1/0432/5225/2829/files/xogojunibemuzijizu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/16520074357.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/jaradarugixagas.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7a8.bin
760c04d28a9d486904b08f70dde82c413ef8b4dbdf898b65c857c5ff13c65029		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A8 5540 bytes
font_01_sfnt_off0000ca5d.bin
688386a78ad67827082fda567bd7b14c729b1199a0ec319183fa78ee915b7412		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5D 4496 bytes
font_02_sfnt_off0000d8e3.bin
7426b9e3eda22ef50b0f0759520f089ddd064bf1eb21d423b65caa9473c9b257		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E3 16740 bytes
font_03_sfnt_off00010a6d.bin
42a692387290b10d2f3c9f91da8087d744b1f320dc48f7abf24ee348062055b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6D 9408 bytes

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