Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3dd8754c708bb7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 13:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c113f5e0d073b9ec189669450752cbe SHA-1: 966e4111d027f9c43126206f6e224bb732b766de SHA-256: 0a3dd8754c708bb748fd909224468db7391971753ad568cab6aec9e52b0fe230
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to what appears to be a link farm designed to host various PDF documents. One prominent link, disguised as a wallpaper download, redirects through 'ttraff.com', a known malicious redirector. This suggests a phishing or scam attempt to direct users to malicious 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.com/pify?keyword=full+hd+car+wallpapers+1080p+free
    • http://nisafubol.antmandesigns.com/uploads/1/3/2/6/132681352/legagolajoludoj.pdf
    • http://files.jaynardiscounts.com/uploads/1/3/0/9/130969384/ecec3508f.pdf
    • http://files.swindonheritageblueplaques.com/uploads/1/3/1/3/131379118/76f465da30.pdf
    • http://bosapopuk.springboardnursery.com/uploads/1/3/1/4/131407921/kijijarekukuzajupu.pdf
    • http://files.lukasstanley.com/uploads/1/3/1/4/131438180/5bb0b24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/accounting_principles_12th_edition_wiley.pdf
    • https://cdn.shopify.com/s/files/1/0438/3136/1686/files/hours_to_seconds_conversion.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/86246436214.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/turetunamanadotuvijivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/jatinaporon.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/27764923668.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/temosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/oceanography_notes_upsc.pdf
    • https://cdn.shopify.com/s/files/1/0437/2617/6407/files/bourke_street_bakery_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/laritesul.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_off00005c9a.bin
c2cb79d425ec552fce30813bde6c90865e80dbb70d1cb8854cd3d1ca8e6ca4b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9A 5676 bytes
font_01_sfnt_off00006ff6.bin
5b1c7d73d4afb716326a93ca135f209ea34e65f4ef2f456ff7a55a6b64b1fd87
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF6 10164 bytes