Malicious PDF — malware analysis report

Static analysis result for SHA-256 892f921972ee1daa…

MALICIOUS

PDF

38.9 KB Created: 2020-11-02 00:38:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 85bd3114f06ff4ad7120636813ab07e5 SHA-1: 4df84011f1c2360940b48167b0bd74c071dc4940 SHA-256: 892f921972ee1daa9567ffdf96d2e9fe708bbd84a3eb9ae1454399b6db57228b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to 'ttraff.com' which is flagged as a malicious redirector, likely serving as a lure for users seeking the 'Z fighters mod apk'. The document body, though heavily obfuscated, contains the same URL. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a malicious download or phishing site.

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/123?keyword=z+fighters+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5f9a928f6d18c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f8fab4058900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f8ab74f35a5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393628/normal_5f8f6e68b89ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f93c810ed16a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f8edff5bb28f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2604/5871/files/47070178864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/19516632419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7170/0644/files/xejojizix.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/44156111685.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/3855960059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/85460018597.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_off000057e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57E5 5444 bytes
SHA-256: 5b90dc737cd260f180007567ca99410a527aab8124f86558b1b92671dcd50ed0
font_01_sfnt_off00006a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A45 10840 bytes
SHA-256: ffeed337da9212f401cf4771fdb9016906097067ef4f987404e436d5dc4bde7e

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