Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2967bf2a4f0257…

MALICIOUS

PDF

47.0 KB Created: 2020-08-15 04:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7193707c94f6ad02b5767cafaded2a69 SHA-1: 3dc9a15f9ccebf2680684d73f4f9cbf462708668 SHA-256: 5e2967bf2a4f02575705b70c513acf010e1eac4c8d04970f5461bb783dab07b3
154 Risk Score

Malware Insights

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

The PDF document contains embedded links, one of which, 'https://ttraff.com/pify?keyword=chip+card+reader+writer+software', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'chip card reader writer software' and numerous other URLs, suggesting a link farm or phishing attempt. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector points to an attempt to lead the user to a harmful 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/pify?keyword=chip+card+reader+writer+software
    • http://files.reveal-and-heal.com/uploads/1/3/1/6/131606343/xeroba.pdf
    • http://tifabolu.healthwisebakeryinc.com/uploads/1/3/1/1/131164250/nonufo.pdf
    • http://vogovel.skincarebyangela.org/uploads/1/3/1/4/131410227/5605973.pdf
    • http://rosurize.wgbiblestore.com/uploads/1/3/0/7/130739430/8872383.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/zilikuroroxaleza.pdf
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/ezgo_txt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/kedezowejevavafikap.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/26951459640.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/85777217600.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/34827221868.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/careless_whisper_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/84894054122.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/29989336025.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/roxololelo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4402/files/muse_butterflies_and_hurricanes_piano.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/66104386858.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7197/files/70962166176.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067bd.bin
78e9a7c0b62e367d4d8ba0334cc7bc9c465061e4ff40e540510f983178e0dbe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BD 5008 bytes
font_01_sfnt_off000078ea.bin
b45a56fa0e000ff6c6878045fc5b7677d15b039ecb5c8166204d2afb4f7f1b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EA 11872 bytes
font_02_sfnt_off0000a0ac.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0AC 4324 bytes

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