Malicious PDF — malware analysis report

Static analysis result for SHA-256 0437c36256640622…

MALICIOUS

PDF

42.6 KB Created: 2020-08-23 20:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ddf2fec13759243008e116dee8b276 SHA-1: e31fc7cd4c9269c3d15605d5a835ac2f72fcacb0 SHA-256: 0437c3625664062283a92d768f105d40416f39eb120110a12eca6722c28402fa
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=bodoni+72+bold+italic+free' which is flagged as a malicious redirector. This suggests the document is designed to lure users to malicious sites, potentially for phishing or malware distribution.

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=bodoni+72+bold+italic+free
    • http://files.staceyweckstein.biz/uploads/1/3/2/8/132815872/zinegi_gigidozipa.pdf
    • http://files.truelighthealingcenter.com/uploads/1/3/2/8/132815190/sufagusapeme.pdf
    • http://revar.waukeshacountyconservatory.com/uploads/1/3/0/8/130813694/5346410.pdf
    • http://files.upstreamlearning.org/uploads/1/3/1/4/131408537/1012437.pdf
    • http://mobokipi.samanthadelgarno.com/uploads/1/3/2/8/132814930/xadilefovixonodeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/79248595459.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/jukidut.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/madisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/jinipeboxukusor.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/34103672247.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/65019481236.pdf
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/transformers_cartoni_animati_anni_80_episodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/barrios_mangore_julia_florida.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/25071328628.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/25552613859.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/fopafogofogurokuji.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4347/files/42162686303.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_off0000554f.bin
ea9e2bbaeff23addb1e6fdb8c7771a61f2ffee094d0be1bf18a14090e37a9a05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x554F 5024 bytes
font_01_sfnt_off0000666d.bin
b9eee8cb3639a89c3840efa8ff9e771b74ca92031aceb21bd7880e66cf8d878b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666D 12160 bytes
font_02_sfnt_off00008f49.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F49 4324 bytes

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