Malicious PDF — malware analysis report

Static analysis result for SHA-256 1844e0e764d7382f…

MALICIOUS

PDF

42.8 KB Created: 2020-09-19 21:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71e316f89c26a39e5ec5fca5a2fb61b6 SHA-1: 3042b9dc7ecf245fb88dc1051b5c72a11b697da5 SHA-256: 1844e0e764d7382f3d232ab79dd461bafc402180a43d53f8252c3daab5bad9c2
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which are algorithmically generated and point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector infrastructure, which is used to obscure the final destination. The document body explicitly mentions "Spotify premium apk mega 2018" and includes URLs that likely lead to malware or unwanted software, indicating a lure to trick users into downloading malicious applications.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.link/wix?keyword=spotify+premium+apk+mega+2018
    • http://files.dixonrams.com/uploads/1/3/1/3/131379594/lufujikarad_toxavuwumeb_fitezusila_sivitiwe.pdf
    • http://files.jordanrmc.com/uploads/1/3/2/6/132680986/vodipekaxeb.pdf
    • http://pemege.mandmcattlecompany.com/uploads/1/3/1/4/131453284/ad97eb.pdf
    • http://files.reedcooper.net/uploads/1/3/1/0/131071067/wasivunomibu.pdf
    • http://files.markchrislermusic.com/uploads/1/3/2/3/132303151/fepidipiluvamis-zemilekoxu-nowaverede.pdf
    • http://files.enablingability.com/uploads/1/3/0/7/130776072/jurexizimoxobu_xanidaxuxowi_vufapojepe.pdf
    • http://kubiwomid.partnersinprayerforourprodigals.com/uploads/1/3/2/8/132814930/715471.pdf
    • http://files.ecoledemusiquejoliette.com/uploads/1/3/1/8/131871977/jiwisudivaxizozenuri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/spotify_premium_code_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/peximililitil.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/mobezolalusifur.pdf
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/gofabeja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51268900441.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/laroj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/88590114212.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/lyman_reloading_manual.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_off000066d3.bin
3889d6dcdb85865d010d7f73e6a400bf786a1c67dd55f4fa8b0efb01270414fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D3 5800 bytes
font_01_sfnt_off00007a8e.bin
65e87925dfba1142b7636f2177f25efe2f2856f0e5dfee74425b4a95baba3ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8E 10672 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.