Malicious PDF — malware analysis report

Static analysis result for SHA-256 084e79dc5bf7ba33…

MALICIOUS

PDF

36.5 KB Created: 2020-08-22 09:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe444d3ca8b9dfebd2e7e1aed3695b79 SHA-1: 797a484b39b8afa15dab7eb77deceb7b191249ec SHA-256: 084e79dc5bf7ba33b95d00a0ad5eee8cc9118965573ae7543a3ede64e2f30829
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'bradesco net empresa' application, suggesting a lure for users seeking legitimate software. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites, likely 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.ru/pify?keyword=aplicativo+bradesco+net+empresa+para+pc
    • http://files.ianmcdougall.org/uploads/1/3/1/3/131378999/rinudutulewudu-kajoz-kosivef-geviwux.pdf
    • http://sisozerir.one-now.com/uploads/1/3/1/3/131384714/1e1e67a25720d8e.pdf
    • http://files.calibeekids.com/uploads/1/3/0/7/130776826/5884258.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3651/6250/files/81877856024.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/vevifipoxezoxepovokusobe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/gavusulupomab.pdf
    • https://cdn.shopify.com/s/files/1/0431/4018/6268/files/homelite_trimmer_head.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2935/files/zetuxazozebaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/8782/0968/files/47332209050.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/86624669024.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/15628558101.pdf
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/34714954538.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/86937388978.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_off00004d01.bin
8a5948ff53e3db8649f5c1eff2696ce236b9073adaa91af5620666f7ac986393
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D01 5408 bytes
font_01_sfnt_off00005f40.bin
2dfd21ed73c9e1e86407bacab7fa78cf76a64484d616197497ab65642b25ac9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F40 11880 bytes