Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a279b0bc38aabcb…

MALICIOUS

PDF

49.9 KB Created: 2020-08-26 16:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfcfe277f819acb30fead83af68bde93 SHA-1: f67493bc8e6ea889470749181e97e7d744be6ca5 SHA-256: 4a279b0bc38aabcbbb552fb7dabdd06719776d6411aa179748db11bc2257176f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=kurtlar+vadisi+zil+sesi, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct the user to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=kurtlar+vadisi+zil+sesi
    • http://wisuxagu.joselinehardrick.com/uploads/1/3/2/3/132302720/vupapuj_besafapeze_mirivi_fegibutixu.pdf
    • http://pubusoxi.marlincoveoc.com/uploads/1/3/0/8/130874104/1e60ed.pdf
    • http://zevur.jesipace-berkeley.com/uploads/1/3/0/8/130813694/8736569.pdf
    • http://files.miscellaneoussushi.com/uploads/1/3/0/8/130814017/nejexirove-pujozivopemim-papipipuxiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/0304/2216/files/bonanza_episodes_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/marriage_anniversary_song_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/12402328654.pdf
    • https://cdn.shopify.com/s/files/1/0430/6170/6903/files/24677563681.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/ninomorerurametixel.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/lixapibubufelelakixik.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/mekutene.pdf
    • https://cdn.shopify.com/s/files/1/0454/7008/9382/files/famuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/0963/6512/files/nrega_job_card_format.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c5f.bin
61220a0dae34d1298b72f9dc29e84aaedfd295c424e610d0b93cf322ab2cb80f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C5F 1768 bytes
font_01_sfnt_off00005506.bin
ba887e41274da2dc1e29c61724eba53cce1e750dc23578c3d722bba31d5217e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5506 4896 bytes
font_02_sfnt_off000065c2.bin
a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2 2140 bytes
font_03_sfnt_off00006f9a.bin
ae8ce5978e839e746d9bc67cadf85fb6c6de2a9a28e6084004deb817e96c8c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9A 17184 bytes
font_04_sfnt_off0000a1bb.bin
939f823ec921443ae058c039cf3cff9821bf58a95f52c7f9f3f3d1ab8778ba2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BB 16376 bytes

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