Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee0f75edf2f5ebd…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 19:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b771f7040c1a7e89b39c309a107476b0 SHA-1: be7b8c9e7b891fbddc889d42ea939f358a59d015 SHA-256: 5ee0f75edf2f5ebdf8143b35bcdbff74df007f31c3c5c21034c2ee4aceebc89d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a significant number of embedded links, forming a link farm. The primary link, 'https://ttraff.com/pify?keyword=barnsley+sixth+form+college+moodle', is identified as a malicious redirector, suggesting the document's purpose is to lure users to malicious websites. 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=barnsley+sixth+form+college+moodle
    • http://files.marcgwynnecigars.com/uploads/1/3/1/3/131383510/guguvi-vemizu-dufev.pdf
    • http://files.synergistic-approach.com/uploads/1/3/2/6/132681233/8c3f43.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/zozowag.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/baguxiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4468/3419/files/apush_chapter_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/38626545063.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/voruvobutukoxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/haggadah_text_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/39932899626.pdf
    • https://cdn.shopify.com/s/files/1/0436/1610/8707/files/11958025630.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/3862459305.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/30751017040.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/45489087591.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0496/files/39444825019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bd3.bin
c8d1ddf990909733fb76a429522d201c0a15073eee969f603597a0eb72b92c99
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD3 5444 bytes
font_01_sfnt_off00006e2c.bin
2ec092b9f0971ccabd25f07ca99d3a69246fce17d991f10c55625f0b70fd769f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2C 13520 bytes
font_02_sfnt_off0000991d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x991D 4324 bytes