Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ea01e3771906d2…

MALICIOUS

PDF

37.9 KB Created: 2020-08-06 15:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74aa1ab20604ab9cc5972640c7ec2d74 SHA-1: acd03b949618570917c267f13da33667a50fbd14 SHA-256: 08ea01e3771906d23b2a7317dde3439d26d0bf94dc2a0558b2021e93b294e47a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector at `https://ttraff.com/pify?keyword=conversion+pdf+word+zamzar`. This suggests the document is designed to lead users to malicious content under the guise of a file conversion service. The ML classifier also strongly indicated maliciousness.

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=conversion+pdf+word+zamzar
    • http://files.thediplip.com/uploads/1/3/0/7/130739343/jigobafise-vuretedu.pdf
    • http://files.dana-farberfriendsplace.org/uploads/1/3/1/3/131398333/a9714.pdf
    • http://feziben.corinne-a-michels-phd.net/uploads/1/3/1/4/131437615/gedije.pdf
    • http://files.karlamoralesphoto.com/uploads/1/3/1/4/131452935/6469711.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/38047062750.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/19604575999.pdf
    • https://cdn.shopify.com/s/files/1/0435/7203/5739/files/nursing_bioethics.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/rupobafanoporulavus.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/metovivagajibu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/38299906031.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/rafosadozozukotiwaj.pdf
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/tight_tiny_pussy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.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_off00005644.bin
249e1141ae126413df04ec7e446ebb4151517bf301bbbd895d6e35ecaebd4e20
pdf-font-stream PDF embedded font (sfnt) at offset 0x5644 5260 bytes
font_01_sfnt_off00006830.bin
c0a88e8803479bc82d72c290d0da3a3e6ba4faef552b88e62a8f11bb7caab89e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6830 10196 bytes