Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebf99b39547fde7…

MALICIOUS

PDF

35.6 KB Created: 2020-09-08 07:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca02166ef586094dab04e7b9beab9d61 SHA-1: 6de18abe78864a6c6ac4ed6baec3549ee12e7e93 SHA-256: eebf99b39547fde7075986a03536fdbb7b1109fa11f5db84a5cb8d10bd935424
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, disguised with text related to government travel card training. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for phishing or malware delivery.

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.club/pify?keyword=government+travel+card+training+test+answers
    • https://cdn.shopify.com/s/files/1/0431/0722/1658/files/89349249019.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/wamuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/22944906545.pdf
    • https://cdn.shopify.com/s/files/1/0461/9999/6569/files/murder_mestri_full_movies.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3443/files/mods_forestier_farming_simulator_2013.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8167/files/98560527111.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/calculus_by_howard_anton_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0534/files/10202419084.pdf
    • https://cdn.shopify.com/s/files/1/0435/1734/5944/files/vorakegurotine.pdf
    • https://static.usrfiles.com/ugd/8ade13_3af5b414db16413083f19d25319b0bf1.pdf
    • https://static.usrfiles.com/ugd/943725_94471ce11a6a4640945e1714722aebc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_127b7f64e5fe454c97d8858f93b75350.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/reference_sheet_name_in_excel_vba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/10130365550.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/10_class_maths_solution_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/cinderella_man_summary.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_off00004e46.bin
d158e2390a8abff3c373f21d9b94b4768c570f1eea8616512a1ad37f716bf282
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E46 5444 bytes
font_01_sfnt_off000060c1.bin
66846a8f851e98e70e33bea986cd95bc9e1c8479ddf7d870230feede9c6ee14c
pdf-font-stream PDF embedded font (sfnt) at offset 0x60C1 9644 bytes