Malicious PDF — malware analysis report

Static analysis result for SHA-256 148ed522c4c7f297…

MALICIOUS

PDF

43.1 KB Created: 2020-08-19 09:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2abca3911d7da4009fc02ee5980d92c SHA-1: fe0030f577a5c6b8a35471a7a8c134d122bca2de SHA-256: 148ed522c4c7f297fd8413d05a581313ddf357c96fab72cfaa1e8d63a5eea36a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a primary redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL is https://ttraff.com/pify?keyword=enrolment+form+l%25C3%25A0+g%25C3%25AC, which is likely used to redirect users to a malicious site.

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=enrolment+form+l%25C3%25A0+g%25C3%25AC
    • http://files.1stusinfantry.com/uploads/1/3/1/3/131379743/5548488.pdf
    • http://files.nanopintechnologies.com/uploads/1/3/2/7/132710661/6808280.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/50606417604.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/bonjour_tristesse_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/diluxamitipariwida.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/42341364807.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/kuwubitikajapokovamape.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/wivireposivuraxif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/bagunipumom.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/57805294806.pdf
    • https://cdn.shopify.com/s/files/1/0434/2598/8757/files/measurement_worksheet_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/764823321.pdf
    • https://cdn.shopify.com/s/files/1/0428/1751/9772/files/demande_aide_logement_caf.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3335/files/82194201892.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_off000063ee.bin
dbf47970958cd0b14aa5574ec3056d179384a51c5aa0f7e88dc842385dfd660a
pdf-font-stream PDF embedded font (sfnt) at offset 0x63EE 4944 bytes
font_01_sfnt_off000074a4.bin
3bd649c83c22fb4561d7d24c79ae2fee29a955e10fc088e646a3da2f72fc3319
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A4 12744 bytes