Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5959c036c760972…

MALICIOUS

PDF

47.3 KB Created: 2020-08-05 17:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26fbd246e2cf61f4b8ee32dcd8671c04 SHA-1: e3c4788ca01fac68deb403637c563c7ebf68f530 SHA-256: b5959c036c76097220bfacbc50fa5bcdbe1bdd11f6aa07b6968c5217c7fad814
154 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a malicious redirector link farm. It contains numerous embedded links, with the primary one leading to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting it's the intended lure. The presence of many external PDF links, including those hosted on Shopify, indicates an attempt to distribute malicious content or traffic through a link farm.

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=altiplano+definicion+pdf
    • http://files.nhswomenslacrosse.com/uploads/1/3/2/6/132681749/0ce27bb329b.pdf
    • http://files.livingponoproject.org/uploads/1/3/1/4/131407111/zezituru_dabugovadosug_mexarunezox_futeled.pdf
    • http://files.worldhumanities.org/uploads/1/3/0/7/130775309/guzixosa.pdf
    • http://files.alexlitsoudis.net/uploads/1/3/1/3/131381109/nexixujudojiwopaweni.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/55869830192.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/8165168609.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/kuzexovinodigisasonavuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/58330585564.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/44988531607.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/32959290186.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/89906586249.pdf
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/80446608804.pdf
    • https://cdn.shopify.com/s/files/1/0429/8217/8979/files/google_featured_photos_locations.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/56584333905.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/simple_one_page_rental_agreement_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/metabolismo_de_bases_nitrogenadas.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/lebijoketurevaririsepugex.pdf
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/vepatewit.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c29.bin
74d879f728336a36f85a1ad5cf8c9a304acd1f795b839ee89baf1e0c30e16d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C29 4864 bytes
font_01_sfnt_off00008cd4.bin
c9490f1f0c7d11851036485f890d7893f3ae7c1ab1e396ac846579fc34b12c25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD4 10564 bytes

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