Malicious PDF — malware analysis report

Static analysis result for SHA-256 2122d1ecffc5756a…

MALICIOUS

PDF

40.6 KB Created: 2020-10-26 13:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 112d30c12845c7676f99e342ddd69794 SHA-1: 996b7c4c2ded9c1786c21d4913410ea2a8de7af9 SHA-256: 2122d1ecffc5756a8e82c05830116ec35ad7ca195b237100fae6d529d827e413
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains multiple embedded links, including a critical redirector link to 'ttraff.club', suggesting a phishing or malware distribution attempt. The document body and heuristics indicate a social engineering lure, specifically a 'ClickFix' attack, instructing the user to execute commands or click links under the pretext of fixing a non-working PDF. The presence of numerous external PDF links also points to a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.club/123?keyword=downloaded+pdf+file+not+working In PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/4140212.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/b73dadb6e493cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9333bf3-bd58-442e-9941-55d7da34bbb6/bolafojuvovufuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9182f0ee-9fff-448c-9400-ae854c52ec42/gatekiforazut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5c5b8e-0a0e-4e32-b44d-fe19ec4cdd9e/94756272039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc44e37-5c5f-4f41-9a97-d5e87374d2f1/69452003898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0571/2296/files/74112775217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1879/9264/files/swtor_legacy_surname.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b4403c-150d-4a86-9fd0-acd0818b753e/74119542249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608f57b5-cd8d-451f-9ce5-cf072b62565b/72740388580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90689575-2b05-48a3-825b-f4f0d1402cb1/96115497334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7115/4592/files/equalizer_fx_apk_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3581/1989/files/kitadokesiwifadaresuniz.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/3d_artist_cv.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/congenital_heart_disease_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/personality_development_and_social_graces.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/bopirijudud.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7B 5184 bytes
SHA-256: f97573b3acefda34310b7870c66931bbfacadb71320d3ac1253a5e87c919c94a
font_01_sfnt_off00006f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4A 11068 bytes
SHA-256: 6fba03251404d012e4bb8932e8f4de61ab2ddc1175cfd36958d82c7f9ad264f2