Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1f34766b8a49b5…

MALICIOUS

PDF

41.1 KB Created: 2020-08-08 20:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d488334a410d90bf5825a9beb6c0d415 SHA-1: 0d69470da80b8f8dc850870f8a095bbb12c5e4d7 SHA-256: 6e1f34766b8a49b5ad432809a91d16ec1c2f17844eb62c5a94c4cd7c90f0e870
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the PDF is designed to lead users to malicious sites, likely for further exploitation or phishing.

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.cc/pify?keyword=cd4051+datasheet+pdf
    • http://files.radcliffechoralsociety.com/uploads/1/3/0/7/130739616/9459618c8.pdf
    • http://sasedu.nataliekyrmizi.com/uploads/1/3/0/7/130775897/5714433.pdf
    • http://files.susansharpeart.com/uploads/1/3/1/3/131398323/mofix_sovup_xokoxilokokam_wozub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/behaviorismo_radical_o_que.pdf
    • https://cdn.shopify.com/s/files/1/0430/8959/2473/files/pafidavipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1568204463.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/fivesinapafepenojozas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3231/2994/files/44075534552.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/9198526745.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/54245401317.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9803/files/pdf_50_sombras_mas_oscuras.pdf
    • https://cdn.shopify.com/s/files/1/0432/2787/3440/files/mulezadim.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/18565122733.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/dependent_prepositions_intermediate.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_off000054db.bin
1aec275ad5dc22a52195641fa222ab55d20597e9b749416cc02d200026c053c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x54DB 4952 bytes
font_01_sfnt_off000065d1.bin
acf5da85956370a169eec145cabb897fb4a36eac6c9b784bd0c8a1c798a8aa02
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D1 10700 bytes
font_02_sfnt_off000089e7.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x89E7 4324 bytes