Malicious PDF — malware analysis report

Static analysis result for SHA-256 123d760f51d9e33b…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 04:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8afc5f5a7bf3861a79bd553a0647e24 SHA-1: 21c2a3f7e9a880a21c8dc6505cc4ff3326758479 SHA-256: 123d760f51d9e33beda8cd7adb9670de2bdf24376a6ee60e7a6b3994d2e01808
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results. This suggests the document is intended to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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.ru/pify?keyword=embed+animated+gif+in+pdf+indesign
    • http://files.peaceofmindproductsbynatalie.com/uploads/1/3/1/4/131407492/zawalotabu_lifexikit_fakofububej_fevugokunuvejom.pdf
    • http://files.friendsofcharliesplace.org/uploads/1/3/1/6/131606407/e4b89.pdf
    • http://files.theuglybowl.com/uploads/1/3/1/1/131164076/fumojosud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/doxivixalu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/lizido.pdf
    • https://cdn.shopify.com/s/files/1/0432/3151/0690/files/5410651040.pdf
    • https://cdn.shopify.com/s/files/1/0454/8227/9062/files/colossenses_hernandes_dias_lopes.pdf
    • https://cdn.shopify.com/s/files/1/0448/0316/2263/files/mahalaxmi_calendar_april_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3033/8966/files/jagolukekibovukena.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/dipovujubanozakutubitub.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/mastering_digital_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/38325636138.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/10304677261.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/wiguro.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_off00007252.bin
bdbacfada33ef71f093ceae328b5f5072d1afc6946e075efa3993ddc4b8c866a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7252 5332 bytes
font_01_sfnt_off00008465.bin
78a415eba17f017c617fcb247df244501299f5c466c9f9e511a74fff2791e62e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8465 10224 bytes