Malicious PDF — malware analysis report

Static analysis result for SHA-256 0144593465e4cc7b…

MALICIOUS

PDF

58.7 KB Created: 2020-08-11 12:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3583f9b5cb4b9a29bb39470e80b35c36 SHA-1: f5893f1921428c30e3c265ca512b80d5d4be6e46 SHA-256: 0144593465e4cc7bae28d4bc001433db83f188930e263579d5b441d64e635e29
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service known to host malicious content. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword that suggests a search engine optimization (SEO) tactic to lure victims. The ML classifier strongly supports the malicious nature of this PDF.

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=que+es+moral+segun+autores+pdf
    • http://zapelu.kansas-al-anon.org/uploads/1/3/2/7/132710621/gubaxid-mesolazewosezi.pdf
    • http://xojezolok.nasreenweldencounseling.com/uploads/1/3/2/7/132741555/5640812.pdf
    • http://files.kettleandcanyon.com/uploads/1/3/0/7/130776266/jojov.pdf
    • http://files.icetnepean.org/uploads/1/3/1/3/131383456/piwoxijumewoguba.pdf
    • http://files.edtc517.com/uploads/1/3/0/7/130776828/xalofomubolo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/famous_bible_characters_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/1190553937.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/driver_toshiba_satellite_l655-_s5096_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/utilisation_du_bicarbonate_de_soude.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/o_level_maths_vectors_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/bupewefulezegol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/tokojulufajixixexevoro.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/26803880557.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/ophthalmology_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/n_butyl_acetate_msds.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/1584932885.pdf
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/76237678816.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_off0000a2c6.bin
dde89c7f593230cf31d5cfc664868edb2e2617c3c2c7644d303b0fef4e217534		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C6 5420 bytes
font_01_sfnt_off0000b51e.bin
b904eaf1686732850d68a3dacb712e2141db3aa4e23e9c48f00dcc48635ed772		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB51E 11808 bytes

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