Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf47aa7b43eebcf…

MALICIOUS

PDF

51.8 KB Created: 2020-08-15 07:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40fdfd9ccf054edff9bfd515fc2d82d SHA-1: 39c7e52a2c1b93b52f41d37287a887e5b1fd938b SHA-256: 5cf47aa7b43eebcf05410c4ad317c39696920467976faa624488795c847ac274
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=report+dogs+barking+all+day', which is flagged as malicious. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests an attempt to obscure the malicious intent and potentially leverage SEO tactics for distribution.

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=report+dogs+barking+all+day
    • http://norafinak.yellowheadauctions.com/uploads/1/3/1/4/131408899/woman_bazofu_kapugegazilamir.pdf
    • http://files.ultimatedoubles.com/uploads/1/3/0/7/130738596/memoku.pdf
    • http://sowexu.umpquavalleydrumlessons.com/uploads/1/3/2/7/132712615/puvotulusamila_vutijel_dolonibubise.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/isometric_grid_template.pdf
    • https://cdn.shopify.com/s/files/1/0443/4988/2524/files/phn_mm_chuyn_i_nh_dng_nh_sang.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/goditador.pdf
    • https://cdn.shopify.com/s/files/1/0438/2228/4960/files/alabama_driver_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/alopecia_areata_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lamafavikunidamekisuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/96653687230.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/autocad_drawing_converter.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/69121622353.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/41906010649.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/clicker_heroes_hacked_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/tic-_tac-_toe_game_java.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d6e.bin
1c3e116aa33ad0ff6ff0c2ab02bb4314b89ec41a4fa33e34a96e81af082164c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6E 5440 bytes
font_01_sfnt_off0000a00d.bin
f783f1c602428e151c1c87172d45a111c61b06db9f93d81f8584a896c881617f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA00D 10080 bytes

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