Malicious PDF — malware analysis report

Static analysis result for SHA-256 68eca2313b294abb…

MALICIOUS

PDF

41.8 KB Created: 2020-08-29 07:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26fecf573e63a32631baee0eb33f440e SHA-1: 7d82a1af27a9e3da301ba4ca2dd1a5d985ede242 SHA-256: 68eca2313b294abb847f71be3fad99fb980212b2a114093eb56c18443f81f2d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.cc/wix?keyword=intercompany+accounts+reconciliation+template+sample', is flagged as malicious. The document body, though heavily obfuscated, contains references to reconciliation templates and other document types, suggesting a lure to trick users into clicking the malicious links. The presence of a link farm and a malicious redirector indicates an attempt to lead users to harmful content.

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.cc/wix?keyword=intercompany+accounts+reconciliation+template+sample
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/love_yourself_answer_album_inside.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/bawikelupabixizapa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/doa_sebelum_membaca_yasin_untuk_oran.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/handy_stitch_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_76881a6c76af480785f015fecb06af56.pdf
    • https://cdn.shopify.com/s/files/1/0465/1817/3854/files/boom_beach_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5745/files/electronique_numrique_bascules_exercice_corrige.pdf
    • https://cdn.shopify.com/s/files/1/0437/2761/8209/files/gorofova.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0551/files/trasformazione_da_minuti_a_centesimi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/othello_character_analysis_essay.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/kufutokow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/3526216386.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/sagilodabewazalip.pdf
    • https://cdn.shopify.com/s/files/1/0433/7991/6963/files/alfred_adler_carti.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_off000066a2.bin
2b8906c1dd325388ec85ee202ba21f90d9f00de7ca9510e68a40adf9d9ac9861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 5120 bytes
font_01_sfnt_off000077ec.bin
d6d9c0ab0cc2223942ee39ed82236e00a8b7a428f0d0a2bc43866837485d644d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EC 10124 bytes

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