Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a0f694d44c1b20…

MALICIOUS

PDF

67.0 KB Created: 2020-08-15 06:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e92ebfd09fc144f96a0ed3ab3ef8953f SHA-1: 3883f14def6575992c079e922544510f02001b15 SHA-256: 17a0f694d44c1b20d2da25d5625805c1fa14e06679ae51437af9cc236270a925
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain a URL that mirrors the malicious redirector. This suggests the PDF is designed to lead users to malicious infrastructure, likely for phishing or malware delivery.

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=kingdom+hearts+dream+drop+distance+wiki+guide
    • http://tekuvuxok.norwichpoetry.org/uploads/1/3/0/9/130969242/4128990.pdf
    • http://files.customcateringco.com/uploads/1/3/0/7/130738841/1458801.pdf
    • http://files.isuprssa.com/uploads/1/3/0/8/130873921/9609515.pdf
    • http://files.jackieschuknecht.com/uploads/1/3/1/6/131606165/lulerewakenunidixiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/adyashanti_books.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/xunudazewi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/padman_full_movie_hd_1080p_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/34473382610.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/wulotelewijiratadatulegis.pdf
    • https://cdn.shopify.com/s/files/1/0428/4225/9612/files/palida.pdf
    • https://cdn.shopify.com/s/files/1/0433/4619/8683/files/kipel.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/jebowivajoxedov.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/laboratory_equipment_list_and_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/40609431634.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_off0000c7ff.bin
587a9a8e15e9777524d7d45b102d14d356006dba655a69c8314f8b20264a8c71
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FF 5580 bytes
font_01_sfnt_off0000dad2.bin
3f81965450a1eaf26779e33b6f116899bfbf090bc41f20aea6402d8d4736110a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 10524 bytes