Malicious PDF — malware analysis report

Static analysis result for SHA-256 897773b558f32e8d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 07:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5821b48df83ffcd604b7d668391acb44 SHA-1: d9ae5e4d175624de5166c393f5c3397936ab314e SHA-256: 897773b558f32e8dd9a10c42164afe018c9194eda8bf4ff46280786668a19412
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector service. The ML classifier and heuristics strongly indicate malicious intent, likely to lure users to malicious infrastructure. The primary malicious URL identified is https://ttraff.me/wix?keyword=more+than+this.

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.me/wix?keyword=more+than+this
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_38d614b8dec34dcc881415fb9c583ce8.pdf
    • https://static.usrfiles.com/ugd/73cb9e_e0d3ad66c2c74a84a0a90cdafd0d1211.pdf
    • https://static.usrfiles.com/ugd/61b8bf_d4a4f66f203246068a43a8db4852f336.pdf
    • https://static.usrfiles.com/ugd/b8c837_496c8eb36ba64e1a8770a0d32e39d74c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf85d2d082af469d8735312db3fb9416.pdf
    • https://static.usrfiles.com/ugd/0a0016_044443c90c87459892b23ce73ab6e7b6.pdf
    • https://static.usrfiles.com/ugd/9dda13_33b7483571244c5aa473ce5eb5f4444c.pdf
    • https://cdn.shopify.com/s/files/1/0430/8461/1733/files/addis_ababa_university_logo.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/daily_planner_template_free_printable.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/30035728980.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/81470663573.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4756/files/anodyne_adjective_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_c53fce6494ad447ebf461da4fc0fe626.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e4ae22bf0574906ae5c79eaa5ef53c8.pdf
    • https://static.usrfiles.com/ugd/221f3a_41cdbca017fa4185ba373371a694d338.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbad77c40c464302a7f3396c96280163.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_off00006370.bin
32bdf4db05a4f3b8eac0a1c872d6b91bf81e955cedd002ac1cfc36da6908c472
pdf-font-stream PDF embedded font (sfnt) at offset 0x6370 4748 bytes
font_01_sfnt_off0000738b.bin
c44cffaac65863dda3b847fe72c077ef404f6a9c9c7469d2dfb986dda5375f3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x738B 10560 bytes