Malicious PDF — malware analysis report

Static analysis result for SHA-256 7838aea743ebdf7b…

MALICIOUS

PDF

38.3 KB Created: 2020-08-09 04:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6c52aec24a97044eff34265cf4e2c0d SHA-1: 3e488d9752eb96b5ab5fdeff9f26edf9f6c31406 SHA-256: 7838aea743ebdf7b7054c0df6b36f056341844c9639fc992b4f179a66cd826c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=vehicle+bill+of+sale+template+fillable+pdf+florida', is identified as a malicious redirector. The document also features a mass external PDF link farm, suggesting a tactic to distribute malicious content or engage in SEO manipulation. The ML classifier strongly indicates malicious intent.

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=vehicle+bill+of+sale+template+fillable+pdf+florida
    • http://files.nowthenfuture.com/uploads/1/3/0/7/130776511/89620.pdf
    • http://files.jackjmatthews.co.uk/uploads/1/3/1/4/131437685/1e24773440.pdf
    • http://files.adoremakeupsalon.com/uploads/1/3/0/7/130739718/jagadoxi.pdf
    • http://files.doubleh-alpacas.com/uploads/1/3/0/8/130814631/xipilowote_wevezizujusu_futiwuwuje_fetuze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/8086831953.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/68977868413.pdf
    • https://cdn.shopify.com/s/files/1/0438/2759/3376/files/clinical_chemistry_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/60605720103.pdf
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/logejemewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/kagawavuvelutagobojapuk.pdf
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/volume_of_a_cuboid_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/mixesutenutulone.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_off00005788.bin
aaf7fa6361ed7ce5870ffadebe90f9bfba7a9b75a2c683059525c6ad9020e651
pdf-font-stream PDF embedded font (sfnt) at offset 0x5788 5500 bytes
font_01_sfnt_off00006a12.bin
9c378de6f71f29519c17bcf2ecfdf212d8cb161bd70e0e14d0cbdce8bd1d2fd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A12 9880 bytes